Orion FC FE Flameproof Switches User Guide

Orion FC FE Flameproof Switches

Specifications

• Product Type: Pressure Switches
• Switch Types: Pressure Difference Switches, Vacuum Switches, Temperature Switches, Flameproof Switches
• Model Numbers: FC, FE
• Certifications: IECEx CoC, PESO CML No.: 7775906
• Bulletin Number: KA231020

Product Usage Instructions

Using the Catalogue
To effectively use the catalogue, it is recommended to familiarize yourself with its organization:

• Catalogue Purpose: This catalogue represents the Kaustubha Udyog flameproof product line and provides ordering information for most popular listings. It also references products not catalogued.
• Distinguishing Factors: Pages 6 to 9 provide information on the distinguishing factors of FC and FE switches to help you select the right product for your application.
• Contents Page: The contents page outlines the organization of the catalogue and helps users familiar with the products locate specific pages or useful information.
• Product Selection Help: The Pictorial Index (Pages No. 14 to 17) classifies products into broad groups. Each group includes a brief description, a typical photo, and the corresponding page number for detailed listings.

Product Types

The product line includes the following types of switches:

• Industrial switches: Designed for heavy-duty applications, these switches can withstand vibrations and have exceptional life and repeat accuracy.
• Process switches: Designed for lighter applications, these switches offer precise switching and are suitable for equipment mounted in open air where the internal operation of the switch needs to be visible.
• Compact switches: Compact and low-cost, these switches are meant for light-duty applications in the OEM industry.
• OEM switches are General-purpose switches that cannot be configured and are intended for stock and sell purposes.

FAQS

Q: Are there other product catalogues available?
A: Yes, there are separate catalogues available for other types of pressure switches. Please contact the sales office for more information.

Q: What is Ogauge?
A: Ogauge is a revolutionary IoT pressure gauge that combines multiple functions like a pressure gauge, switch, transmitter, datalogger, and IoT capability. It features a full-colour OLED informative display and has 4-time relays with adjustable switching points and switch-back points. For more information, refer to the Ogauge Catalogue.

Only the flameproof FC & FE series are covered in this catalogue. The following types of pressure switches are covered in seperate catalogues. Please contact the sales office for more information.
Other Products
Consolidated Catalogue
Industrial switches: These switches have been designed for heavy duty applications, where products should withstand vibrations or should have an exceptionally long life and repeat accuracy.
Process switches: These switches have been designed for lighter applications requiring precise switching, for equipment mounted in open air, where the internal operation of the switch needs to be visible.
Compact switches: These are compact, low cost and meant for light duty applications for the OEM industry.
OEM switches: These are used in most general purpose applications. These switches cannot be configured and intended for stock and sell.

Bulletin No. KA231020

Oguage Catalogue
Ogauge is the world’s first IIoT pressure gauge, a pathbreaking device that combines functions in instrumentation like, Pressure gauge, Switch, Transmitter, a Datalogger AND also has IoT capability. Other special features: Full colour OLED informative display 4 time relays, switching points and switch-back points can be
adjusted very simply and independently of one another using the onboard capacitive touch keypad, still simpler via mobile app Programming is also possible through a cloud based dashboard It is a industry 4.0 ready. Monitoring of process parameters possible in real time, from anywhere, by pairing it to any wifi router Can be paired to a mobile via app to check live pressures Analog output signal configurable Can be set to display values in any unit of measurements e.g.: kN, kg, psi,… And many useful additional functions….

Scan Me – Ogauge Catalogue
By taking a few minutes to familiarise yourself with how the catalogue is organized, you will find it very easy to use.

Catalogue Purpose
This catalogue is a representative of the Kaustubha Udyog flameproof product line. It presents simplified ordering information on most products and references products not catalogued. This catalogue is intended to familiarise users with the broad product offering and provide ordering information for most popular listings, many available off the shelf from local authorised distributors.
This section helps you make a logical choice in selecting the best product for a particular application. It allows a user familiar with our product line to locate the exact page the product is listed on. For those not familiar with our products, a logical sequence is given to help the user pick the best product for their need.
By taking a few minutes to familiarise yourself with the catalogue organisation, you will find it very easy to locate the product / information you need.

1. The distinguishing factors of FC and FE switches are given on pages 6 to 9. It will help for selection of right product for your application.
2. The contents page lists the broad outline in which the catalogue is organised, and will help the user familiar with products to select the page on which the product or other useful information is listed.
3. Need Product Selection help ? Product selection help will start with the “Pictorial Index” (Page No. 14 to 17) of selected section, where the products are broadly classified.
4. A brief description of each product group , a typical photo of the product within the group and the page number on which it is listed are given.
5. If the user is not familiar with the products, a product selection guide is provided in each individual section, where photos for each product and important specifications are given to help determine and select the best product for the application.

By evaluating and comparing these parameters, a logical selection can be made. Turn to the page on which the product information for the selected product is listed, for :
Capsule Construction details Physical sizes Special features Ranges, hysterisis, electrical ratings etc. Ordering information Some applications
In many cases, more than one product may work. For the most cost effective solution, compare prices and consider alternatives. Remember, the end cost includes initial product price, plus the installation, plus the service.
4. Need information on Accessories? (see page 124) Turn to page 124 for information on important accessories. These will give information on only important accessories, and information needed, when these are to be supplied with our products.
5. Need the terminology explained? (see page 128)
Turn to page 128 for the definitions and terminology. This will help you familiarise with the terms used throughout the catalogue.
6. Need selection guidance? (see page 129) A logical procedure on page 129 will help you to consider most of the important factors when selecting a pressure switch.
Due to the variety in product types and their salient features, catalogue page formats may vary. But generally the following format is adhered to.

Elements appearing on each page will be (see pg.no. 5)
1. Product family / series – A product family / series will appear on the outside page corner, depending on the left / right hand page, and will be in large bold type.
2. Product section – will appear immediately following the product family / series at top of the page and will be in bold type.
3. Pressure capsule details – will show the construction of the pressure capsule and all it’s internal parts. If the process/working medium is variable, the wetted parts will be mentioned in italics. If the wetted parts are unique, the material of construction (MOC) will be mentioned alongside in brackets. Where the material of construction is not specified, it will vary and the options are to be selected by the user considering the compatibility of the process / working medium. Modifications can be made to suit any particular medium, if the answer for your needs is not in the standard MOC listed. Pressure capsule details of accessories are not given.
4. Installation drawing – will show the typical installation dimensions of products as they exist in their standard forms. The dimensions are mentioned in millimetres and also in inches to facilitate the user. The dimensions of accessories will have to be added to these to arrive at any particular general arrangement (GA) drawings. The dimensions are approximate and for precise dimensions, where mounting space is restricted, the user may contact the nearest sales office. Installation drawings of only fast moving accessories are given.

5. Photos – will appear on the top of the relevant page for products. If there are mounting variations / styles, all the styles for standard products will appear for easy identification. Options, if included in the photograph, are for demonstration only, and are not a part of the standard equipment. For accessories, the photos are not given due to the sheer variety and range available.
6. Logo – will appear on top of initial section page to identify the manufacturer.
7. Characteristics – This section contains the range selection table in which user can choose different range code according to application. This table specifies the total range, differential value and maximum working pressure.
8. Ordering guide – In this section, codes are alloted for switch type, Range code, Microswitch type, Pressure port, Diaphragms etc. The complete final code of the switch is shown at bottom of the page. This code is used to order the switch from our sales office. Any additional accessories or modifications required for the product need to be mentioned in text by the user.
9. Switch weight – Approximate net weight (in Kgs) for a particular switch model will appear here, in how to order tables.
10. Numerous combinations are possible when pressure switches are provided with accessories like chemical seals, snubbers, remote seals, pipe mounting brackets, combination of switches mounted in a panel etc. Users are requested to provide the details of accessories required in text / drawings, as separate identification codes are provided for pressure switches fitted and supplied with accessories.

Introduction

ATEX & IECEx certified FC series pressure and temperature switches have been designed for use in hazardous areas and for severe applications in the Oil and Gas sectors like oil and gas pipelines, petrochemical plants, refineries and generally in atmospheres which are potentially explosive. All switches are designed for gas group IIC, the most severe of the explosive gases, and hence can be used in lower severity atmospheres, typically in IIA and IIB. With grey cast iron enclosures, these can also be used in mines.
SS enclosures can also be offered for highly corrosive atmospheres. Switches can be configured with a lot of options like electrical elements and sensing element configurations to suit the intended working media.
Applications: Y Oil & Gas Y Petrochemical Y Refineries Y Bulk Drug & Pharma Y Chemical Industries

Product Specifications: Y Storage Temp. : Atmospheric temperature Y Operating ambient Temp. : 0 to 60 degree C Y Media Temp.:- for non-metallic diaphragms 80 C max., Y higher with metal diaphragms Y Set point repeatability : +/- 1% over full range Y Enclosure details : Al grade LM6 / Grey Cast Iron /

Stainless steel Casing & Cover Y Enclosure Specifications :
II 2 GD, Ex db IIC T6 Gb, Ex tb IIIC T85°C Db (-20°C < Ta < +60°C) Y Protection : IP66 Y Switch output 1 SPDT and 2 SPDT
Complies to : Y IEC 60079-0:2017, IEC 60079-1:2014, IEC 60079-31:2013 Y EN 60079-0:2018, EN 60079-1:2014, EN 60079-31:2014
Features Y Compact, rugged Design Y Reliable, accurate micro switches used Y Customised Micro switch arrangement can be provided, on request Y Easy, safe wiring connections Y High/low pressure options available Y Warranty 2 Years

Advantages of FC switches:
Y Large spring for accurate setpoint
Y Better accuracy
Y External scale for visible setpoint (optional)
Y Approvals suitable across the world. – ATEX – IECEx – BIS – PESO

Bulletin No. KA231020FC Typical Switch Construction

Large Flamepaths for better safety
Seperate Terminal block for safe wiring
Cover chained to main body
Large Springs for finer set-points Nonmetallic diaphragms
for minimal drift (Note : Metallic diaphragms
also available on request)

Electrical Connection :

Z

2

3

1

Internal ground screw
Robust Snap action microswitches for reliable switching
Lock Screw for stable set-points

Large Sensing area for better sensitivity

7

Bulletin No. KA231020PESO certified FE series pressure and temperature switches have been designed for use in hazardous areas and for severe applications in the Oil and Gas sectors like oil and gas pipelines, petrochemical plants, refineries and generally in atmospheres which are potentially explosive. All switches are designed for gas group IIC, the most severe of the explosive gases, and hence can be used in lower severity atmospheres, typically in IIA and IIB. With grey cast iron enclosures, these can also be used in mines.
SS enclosures can also be offered for highly corrosive atmospheres. Switches can be configured with a lot of options like electrical elements and sensing element configurations to suit the intended working media.

Applications:
Y Oil & Gas Y Petrochemical Y Refineries Y Bulk Drug & Pharma Y Chemical Industries
Product Specifications:
Y Storage Temp. : Atmospheric temperature Y Operating ambient Temp. : 0 to 60oC Y Media Temp.:- for non-metallic diaphragms
80oC max., Y Higher with metal diaphragms Y Set point repeatability : +/- 1% over full range Y Enclosure details : Al grade LM6 Y Enclosure Specifications :
Exd IIC T6 Gb (-20°C < Ta < +60°C) Ex tb IIIC T 85°C Db Y Protection : IP66 Y Switch output 1 SPDT and 2 SPDT
Complies to :
Y IS/IEC 60079-0-2011, Y IS/IEC 60079-1: 2014
Features Y Compact, rugged Design Y Reliable, accurate micro switches used Y Customised Micro switch arrangement can be
provided, on request Y Easy, safe wiring connections Y High/low pressure options available Y Warranty 2 Years

Advantages of FE switches: Y Compact Y Double diaphragm seal Y Cost effective Y Certifications & Approvals for Indian market –
– BIS – PESO

Approximate Weight :

Pressure switches with Aluminium enclosure : 1.9 Kg./4.1 Pound

Pressure switches with Grey CI enclosure : 4.3 Kg./9.4 Pound

Pressure switches with SS enclosure

4.4 Kg./9.7 Pound

Some Applications :
Used in hazardous areas for applications like fire fighting systems, LPG bottling plants, etc. For any type of corrosive and non-corrosive gases and fluids.

Bulletin No. KA231020

FE Typical Switch Construction

Electrical Connection :

Approximate Weight : Pressure switches with Aluminium enclosure : 1.37 Kg.
Some Applications : Used in hazardous areas for applications like fire fighting systems, LPG bottling plants, etc. For any type of corrosive and non- corrosive gases and fluids.

Large Flamepaths for better safety
Seperate Terminal block for safe wiring
Cover chained to main body
Springs for finer set-points Nonmetallic diaphragms
for minimal drift (Note : Metallic diaphragms
also available on request)

Internal ground screw

Robust Snap action microswitches for reliable switching
Lock Screw for stable set-points
Large Sensing area for better sensitivity
Bulletin No. KA231020

International Certifications for FC series
IEwCiCthoECx

Bulletin No. KA231020

10

International Certifications for FC series

11

Bulletin No. KA231020

Indian Certifications for FC series

KLPL Test Report

PESO Approval

BIS License

Bulletin No. KA231020

12

Indian Certifications for FE series

KLPL Test Report

PESO Approval

BIS License

13

Bulletin No. KA231020

FC Pictorial Index

PRESSURE SWITCHES

HIGH RANGE

HIGH PROOF HIGH RANGE

LOW RANGE

LOW RANGE HIGH PROOF

ULTRA LOW RANGE

Page No. 26 HYDRAULIC DIAPHRAGM*

Page No. 30 FLANGED

Page No. 34

Page No. 38

Page No. 42

Page No. 46

Page No. 50

PRESSURE DIFFERENCE SWITCHES

HIGH RANGE

HIGH RANGE DP

HYDRAULIC RANGE DP

LOW RANGE

LOW DP HIGH PROOF

LOW P HIGH PROOF

Page No. 54 ULTRA LOW RANGE PD

Page No. 58

Page No. 62

Page No. 66

Page No. 70

Page No. 74

Page No. 78

*Hydraulic ranges are ranges typically from 2 bar to 700 bar, used in oil applications. However, these switches can be used for other media depending on wetted parts compatibility.

Bulletin No. KA231020

FC Pictorial Index
VACUUM SWITCHES

Page No. 82
COMPOUND SWITCHES
HIGH RANGE LOW RANGE

HIGH RANGE AIR RELAY

HYDRAULIC DIAPHRAGM AIR RELAY

Page No. 86

Page No. 90

PNEUMATIC SWITCHES

LOW DP HIGH PROOF
AIR RELAY

VACUUM AIR RELAY

Page No. 95

Page No. 99

Page No. 103 Page No. 107

TEMPERATURE SWITCHES
DIRECT MOUNTED

Page No. 110 Page No. 114

*Pneumatic switches gives a pneumatic output instead electrical output. Since no electricity is involved thus no need of flameproof certification.

Bulletin No. KA231020

FE Pictorial Index

PRESSURE SWITCHES

HIGH RANGE

HIGH PROOF HIGH RANGE

LOW RANGE

LOW RANGE HIGH PROOF

ULTRA LOW RANGE

Page No. 27 HYDRAULIC DIAPHRAGM*

Page No. 31 FLANGED

Page No. 35

Page No. 39

Page No. 43

Page No. 47

Page No. 51

PRESSURE DIFFERENCE SWITCHES

HIGH RANGE

HIGH RANGE DP

HYDRAULIC RANGE DP

LOW RANGE

LOW DP HIGH PROOF

LOW P HIGH PROOF

Page No. 55 ULTRA LOW RANGE PD

Page No. 59

Page No. 63

Page No. 67

Page No. 71

Page No. 75

Page No. 89

*Hydraulic ranges are ranges typically from 2 bar to 700 bar, used in oil applications. However, these switches can be used for other media depending on wetted parts compatibility.

Bulletin No. KA231020

16

FE Pictorial Index
VACUUM SWITCHES

Page No. 83
COMPOUND SWITCHES
HIGH RANGE LOW RANGE

Page No. 87

Page No. 91

TEMPERATURE SWITCHES
DIRECT MOUNTED

Page No. 111 Page No. 115

17

Bulletin No. KA231020

FC/FE Product Selection Guide
High Range Pressure Switches High Proof High Range Pressure Switches Low Range Pressure Switches

Page No. 26 Page No. 27 Page No. 30 Page No. 31 Page No. 34 Page No. 35

Switch type
Repeatability* (% FSR)
Range covered
Enclosure Protection

Enclosure Material

sensing element

W E

Standard Optional

T T E D

Pressure housing Standard Optional

P Other Wetted Parts

A

R T S

Optional wetted parts through chem. seal

High range pressure ± 1
0.067 bar to 25 bar

High proof high range ± 1
0.1 bar to 25 bar

Low range pressure ± 2
1.5 mbar to 350 mbar

IP 66
FC/FE 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel
Diaphragm nylon reinforced neoprene diaphragm
PTFE, SS316L

Hastelloy C, Monel

SS 316

SS316, Hastelloy B2, Hastelloy C4, Hastelloy C22, Hastelloy C276, Inconel Alloy 600, Monel Alloy 400, Monel Alloy K500, Nickel, Platinum,
Tantalum, Titanium, Zirconium, Silver, PTFE

Temp. of working medium
Switching element

For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
For higher temperature, please use impulse tubing/chemical seals.
SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

Accessories can be supplied with most of the switches. Please consult sales office. *Repeatability changes with switch configuration.

Bulletin No. KA231020

FC/FE Product Selection Guide
Low Range High Proof Switches Ultra Low Range Switches Hydraulic Range Switches

Page No. 38 Page No. 39
Low range high proof ± 1
1.5 mbar to 350 mbar

Page No. 42 Page No. 43
Ultra low range ± 1
0.4 mbar to 4 mbar

Page No. 46 Page No. 47
Hydraulic Diaphragm ± 2
0.5 bar to 1000 bar

IP 66

FC/FE 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel

Diaphragm
nylon reinforced neoprene diaphragm PTFE, SS316L

Diaphragm SS316L
PTFE, Neoprene, Hastelloy C, Monel, Titanium, Tantalum

SS 316

Aluminium SS 316
PTFE, SS 316

SS316, Hastelloy B2, Hastelloy C4, Hastelloy C22, Hastelloy C276, Inconel Alloy 600, Monel Alloy 400, Monel Alloy K500, Nickel, Platinum,
Tantalum, Titanium, Zirconium, Silver, PTFE
For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
For higher temperature, please use impulse tubing/chemical seals.
SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

19

Bulletin No. KA231020

FC/FE Product Selection Guide
Flanged Switches High Range Pressure Difference Switches High Range DP

Page No. 50 Page No. 51 Page No. 54 Page No. 55 Page No. 58 Page No. 59

Switch type
Repeatability* (% FSR)

Flanged ± 1

High range pressure difference ± 1

High range DP ± 1

Range covered

0.1 bar to 200 bar

0.1 bar to 3.6 bar

0.1 bar to 25 bar

Enclosure Protection
Enclosure Material

IP 66
FC/FE 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel

sensing element

W E

Standard Optional

T T E D

Pressure housing Standard Optional

Flange SS316L Hastelloy C, Titanium, Monel, Tantalum

P Other Wetted Parts

Optional wetted parts through chem. seal

PTFE Neoprene, PTFE

PTFE, SS316L, Monel

Diaphragm
nylon reinforced neoprene diaphragm, PTFE

Aluminium SS 316, Monel
PTFE, SS 316

Aluminium SS 316, Monel
PTFE, SS 316

SS316, Hastelloy B2, Hastelloy C4, Hastelloy C22, Hastelloy C276, Inconel Alloy 600, Monel Alloy 400,
Monel Alloy K500, Nickel, Platinum, Tantalum, Titanium, Zirconium, Silver, PTFE

Temp. of working medium
Switching element

For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
For higher temperature, please use impulse tubing/chemical seals.
SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

Accessories can be supplied with most of the switches. Please consult sales office. *Repeatability changes with switch configuration.

Bulletin No. KA231020

20

FC/FE Product Selection Guide
Hydraulic Range DP Switches Low range Pressure Difference Switches
Low DP High Proof Switches

Page No. 62 Page No. 63
Hydraulic range DP ± 1
0.1 bar to 400 bar

Page No. 66 Page No. 67
Low range pressure difference ± 2
1.5 mbar to 350 mbar

Page No. 70 Page No. 71
Low DP High Proof ± 2
1.5 mbar to 350 mbar

IP 66

FC/FE 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel

Diaphragm
nylon reinforced neoprene PTFE, SS316L, Monel

Diaphragm nylon reinforced neoprene

Diaphragm
nylon reinforced neoprene diaphragm PTFE

Aluminium SS 316

SS 316

PTFE, SS 316

Al, Neoprene, SS, Nitrile, M.S.

SS316, Hastelloy B2, Hastelloy C4, Hastelloy C22, Hastelloy C276,
Inconel Alloy 600, Monel Alloy 400, Monel Alloy K500, Nickel, Platinum, Tantalum, Titanium, Zirconium, Silver,
PTFE

Neoprene, PTFE

For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
For higher temperature, please use impulse tubing/chemical seals.

SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

21

Bulletin No. KA231020

FC/FE Product Selection Guide
Low P High Proof Switches Ultra Low Range PD Switches Vacuum Switches

Page No. 74 Page No. 75 Page No. 78 Page No. 79 Page No. 82 Page No. 83

Switch type

Low p High Proof

Ultra low range PD

Vacuum

Repeatability* (% FSR)

± 2

± 1

± 2

Range covered

5 mbar to 350 mbar

0.4 mbar to 4 mbar

760 mmHg to 100 mmHg

Enclosure Protection

IP 66

Enclosure Material

FC/FE 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel

sensing element

W E

Standard Optional

T T E D

Pressure housing Standard Optional

P Other Wetted Parts

A

R T S

Optional wetted parts through chem. seal

Temp. of working medium

Switching element

Diaphragm
nylon reinforced neoprene diaphragm PTFE

SS 316

Aluminium SS 316

PTFE / SS 316 / Neoprene

SS 316, PTFE

Neoprene, PTFE

SS316, Hastelloy B2, Hastelloy C4, Hastelloy C22, Hastelloy C276,
Inconel Alloy 600, Monel Alloy 400, Monel Alloy K500, Nickel, Platinum, Tantalum, Titanium, Zirconium, Silver,
PTFE

For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
For higher temperature, please use impulse tubing/chemical seals.

SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

Accessories can be supplied with most of the switches. Please consult sales office. *Repeatability changes with switch configuration.

Bulletin No. KA231020

22

FC/FE Product Selection Guide
Compound High Range Switches Compound Low Range Switches
High Range Air Relay Switches

Page No. 86 Page No. 87
Compound high range ± 2
-1 bar to 7 bar

Page No. 90 Page No. 91
Compound low range ± 1
-100 mbar to 100 mbar

Page No. 95
High range air relay ± 1
0.067 bar to 25 bar

IP 66

FC/FE 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel

Diaphragm nylon reinforced neoprene diaphragm

Diaphragm nylon reinforced neoprene diaphragm
PTFE

Diaphragm
nylon reinforced neoprene diaphragm PTFE, SS316L, Hastelloy C, Monel,
Titanium, Inconel

SS 316

SS, PTFE

Neoprene, PTFE

SS316, Hastelloy B2, Hastelloy C4, Hastelloy C22, Hastelloy C276,
Inconel Alloy 600, Monel Alloy 400, Monel Alloy K500, Nickel, Platinum, Tantalum, Titanium, Zirconium, Silver,
PTFE

For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
For higher temperature, please use impulse tubing/chemical seals.

SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

23

Bulletin No. KA231020

FC/FE Product Selection Guide
High Range Air Relay Switches Low DP High Proof Air Relay Switches Vacuum Air Relay Switches

Note: Air Relay Switches available only in FC series

Page No. 99

Page No. 103

Page No. 107

Switch type

Hydraulic diaphragm air relay Low DP high proof air relay

Vacuum air relay

Repeatability* (% FSR)

± 1

± 1

± 1

Range covered

0.5 bar to 1000 bar

5 mbar to 350 mbar

1.760 mmHg to 100 mmHg

Enclosure Protection

IP 66

Enclosure Material

FC 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel

sensing element

W E

Standard Optional

T T E D

Pressure housing Standard Optional

Diaphragm
nylon reinforced neoprene diaphragm PTFE, SS316L, Hastelloy C, Monel,
Titanium, Inconel

Diaphragm
nylon reinforced neoprene diaphragm Neoprene, PTFE

Diaphragm
nylon reinforced neoprene diaphragm Neoprene, PTFE, Monel, Titanium, Inconel

SS 316

P Other Wetted Parts

A

SS316, Hastelloy B2, Hastelloy C4,

R T S

Optional wetted parts through chem. seal

Hastelloy C22, Hastelloy C276, Inconel Alloy 600, Monel Alloy 400, Monel Alloy K500, Nickel, Platinum, Tantalum, Titanium, Zirconium, Silver,

PTFE

Neoprene, PTFE

SS316, Hastelloy B2, Hastelloy C4, Hastelloy C22, Hastelloy C276,
Inconel Alloy 600, Monel Alloy 400, Monel Alloy K500, Nickel, Platinum, Tantalum, Titanium, Zirconium, Silver,
PTFE

Temp. of working medium

For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
For higher temperature, please use impulse tubing/chemical seals.

Switching element

SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

Accessories can be supplied with most of the switches. Please consult sales office. *Repeatability changes with switch configuration.

Bulletin No. KA231020

24

FC/FE Product Selection Guide
Temperature Switches

Page No. 110 Page No. 111
Temperature
25oC to 215oC

Page No. 114 Page No. 115
Direct Mounted Temperature ± 1
25oC to 215oC

FC/FE 1, 2, 3 models (gas group IIC) : Diecast aluminium FC 4, 5, 6 models (gas group IIC) : Grey cast iron FC 7, 8, 9 models (gas group IIC) : Stainless Steel
Bulb/probe Brass

For non-metallic diaphragm: 80oC maximum. For metallic diaphragm: 150oC maximum.
SPDT Snap action switch A1 : General purpose rated at 15A, 250 VAC, 0.2 A, 250 VDC resistive. Other microswitches with gold plated contacts, hermetically sealed etc. also available. (Ref. Pg. 118)

25

Bulletin No. KA231020

FC/FE HIGH PRESSURE RANGES FC
PRESSURE CAPSULE DETAILS

6 5
4 3

2

Note : wetted parts are mentioned in italics.

1

INSTALLATION DRAWING
145.0 (5.71) 126.0 (4.96)

No. Description 1. High Pressure Port (SS316) 2. Housing Plate (SS316) 3. PTFE® O-Ring 4. SS 316 Ring 5. Diaphragm (PTFE®) 6. Conical Plunger

Cable Entry
1/2″ NPT(F) (Options Avail.)

110.0 (4.33)

26.0 (1.02)

208.0 (8.2)

Ø7 (Ø 0.27), Mounting Holes, 2nos

148.0 (5.82)

75Bulletin No. KA231020

Pressure Port 1/4″ BSP(F) Std. (Options Avail.)
26

A/F 19 (A/F 0.74)

APPROX. DIMENSIONS IN

mm inches

FC/FE HIGH PRESSURE RANGES FE
PRESSURE CAPSULE DETAILS

3 2

1
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING
145.0 (5.7)

126.0 (4.96)

No. Description 1. High Pressure Port 2. PTFE® O-Ring 3. SS 316 Ring 4. Diaphragm 5. Conical Plunger
5 4

Cable Entry
1/2″ NPT(F) (Options Avail.)

110.0 (4.33)

26 (1.02)

158 (6.22)

98 (3.85)

Ø7, Mounting Holes 2 nos
A/F 19 (A/F 0.74)

1/4″ BSP(F) Pressure Port
27

50.8 (2.0)

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE HIGH PRESSURE RANGES
RANGE SELECTION TABLE

Range Code LP

Range bar (psi) 0.067 – 0.213 (0.97 – 3.09)

Differential* bar (psi)
Approximate Maximum for “A1”
microswitch
0.02 (0.29)

Maximum Working Pressure bar (psi)
5.0 (72.52)

LP5

0.1 – 0.5 (1.45 – 7.25)

0.08 (1.16)

5.0 (72.52)

H01

0.1 – 1.0 (1.45 – 14.50)

0.10 (1.45)

12.0 (174.05)

H02

0.1 – 1.5 (1.45 – 21.76)

0.12 (1.74)

12.0 (174.05)

H03

0.2 – 2.6 (2.90 – 37.71)

0.15 (2.17)

12.0 (174.05)

H04

0.2 – 3.6 (2.90 – 52.21)

0.20 (2.90)

12.0 (174.05)

H07

0.5 – 7.0 (7.25 – 101.53)

0.20 (2.90)

12.0 (174.05)

H10

0.5 – 10.0 (7.25 – 145.038)

0.40 (5.80)

25.0 (362.60)

H15

1.0 – 15.0 (14.5 – 217.56)

0.80 (11.60)

25.0 (362.60)

H30

5.0 – 25.0 (72.52 – 362.60)

1.0 (14.5)

35.0 (507.63)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Note: Welded diaphragm also available as shown

Bulletin No. KA231020

28

57

HOW TO ORDER FLAMEPROOF HIGH RANGE PRESSURE SWITCHES

HIGH PRESSURE FC/FE RANGES

29

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 1.870 1.370

Grey CI SS

4.270 3.770 4.420 3.920

*Not available in FE models

P 1 = pressure switch, fixed differential without scale
P2 = pressure switch, fixed differential with scale in bar
P3 = pressure switch, fixed differential with scale in psi

LP = (0.067 – 0.213) LP5 = (0.1 – 0.5) H01 = (0.1 – 1.0) H02 (0.1 – 1.5) H03 = (0.2 – 2.6) H04 = (0.2 – 3.6) H07 = (0.5 – 7.0) H10 = (0.5 – 10.0) H15 = (1.0 – 15.0) H30 = (5.0 – 25.0)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General

S1 =

0 =

purpose microswitch SS316 / ¼” BSP(F) Neoprene

rated at 15 A; 250 VAC

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A6 = elements with adjustable deadband

S3 = SS316 / 1″ BSP(M) Welded Diaphragm

2 = SS 316L

*A7 = 2SPDT

S4 =

switching elements SS316 / 1/2″

3 = Hastelloy C

A8 = General purpose NPT(F)

4 =

microswitch rated at 5 A, 250 VAC; 5 A, 28 VDC
*B7 = 2SPDT Switching Elements

S5 = SS316 / 1/2″ NPT(M)
H1 = Hastelloy C /

Monel 5 = Titanium 6 =

C6 = 1SPDT

¼” BSP(F)

Tantalum

Adjustable Differential

H2 = Hastelloy C / ¼” NPT(F)

7 = Inconel

N1 = Monel / ¼” BSP(F)

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

N2 = Monel / ¼” NPT(F)
More options available, please contact sales office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having 0.1 bar to 1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

P1

H01

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE HIGH PROOF HIGH RANGE SWITCHES FC
PRESSURE CAPSULE DETAILS

4

No. Description 1. Pressure Housing

3

2. PTFE O-Ring

2

3. Diaphragm

4. Conical Plunger

Note : wetted parts are mentioned in italics.

1

INSTALLATION DRAWING
145.0 (5.71)
126.0 (4.96)

CABLE ENTRY 1/2″ NTP(F) (Options Avail.)

110.0 (4.33)

26.0 (1.02)

215.0 (8.47)

Ø7 (Ø 0.27), Mounting Holes, 2nos

155.0 (6.09)

Bulletin No. KA231020

PRESSURE PORT 1/4″ BSPF Std.(Options Avail.)
30

A/F 19 (A/F 0.74)

APPROX. DIMENSIONS IN

mm inches

FC/FE HIGH PROOF HIGH RANGE SWITCHES FE
PRESSURE CAPSULE DETAILS

4
3 2

1
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

126 (4.96)

145 (5.7)

No. Description 1. Pressure Housing 2. PTFE O-Ring 3. Diaphragm 4. Plunger

Cable Entry 1/2″ NPT(F) (Options Avail.)

110 (4.33)

26.0 (1.02)

105 (4.13)
165 (6.49)

Ø7, Mounting Holes 2 nos
A/F 19 (0.74)
75

1/4″ BSP(F) Pressure Port
31

50.8

(2.0)

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE HIGH PROOF HIGH RANGE SWITCHES
RANGE SELECTION TABLE

Range Code P01

Range bar (psi) 0.1 to 1.0
(1.45 to 14.50)

Differential* bar (psi)
Approximate Maximum for “A1”
microswitch
0.20 (2.9)

Maximum Working Pressure bar (psi)
70.0 (1015.26)

P02

0.1 to 1.5 (1.45 to 21.76)

0.20 (2.9)

70.0 (1015.26)

P03

0.2 to 2.6 (2.90 to 37.71)

0.30 (4.35)

70.0 (1015.26)

P04

0.2 to 3.6 (2.90 to 52.21)

0.40 (5.80)

70.0 (1015.26)

P07

0.5 to 7.0 (7.25 to 101.53)

0.50 (7.25)

70.0 (1015.26)

P10

0.5 to 10.0 (7.25 to 145.04)

0.80 (11.6)

70.0 (1015.26)

P15

1.0 to 15.0 (14.50 to 217.56)

1.50 (21.76)

70.0 (1015.26)

P30

5.0 to 25.0 (72.52 to 362.60)

1.50 (21.76)

70.0 (1015.26)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Note: Welded diaphragm also available as shown

Bulletin No. KA231020

32

57

HOW TO ORDER FLAMEPROOF HIGH PROOF HIGH RANGE PRESSURE SWITCHES

HIGH PROOF HIGH RANGE FC/FE SWITCHES

33

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 1.870 1.370

Grey CI SS

4.270 3.770 4.420 3.920

*Not available in FE models

P 1 = pressure switch, fixed differential without scale
P2 = pressure switch, fixed differential with scale in bar
P3 = pressure switch, fixed differential with scale in psi

P01 = (0.1 – 1.0) P02 (0.1 – 1.5) P03 = (0.2 – 2.6) P04 = (0.2 – 3.6) P07 = (0.5 – 7.0) P10 = (0.5 – 10.0) P15 = (1.0 – 15.0) P30 = (5.0 – 25.0)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General

S1 =

0 =

purpose microswitch SS316 / ¼” BSP(F) Neoprene

rated at 15 A; 250 VAC

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

A6 = elements with adjustable deadband
A7 = 2SPDT switching elements

S3 = (welded

2 =

diaphragm)

SS 316L

SS316 / 1″ BSP(M)

S4 = SS316 / 1/2″

3 = Hastelloy C

A8 = General purpose NPT(F)

4 =

microswitch rated at 5 A, 250 VAC; 5 A, 28 VDC

S5 = SS316 / 1/2″ NPT(M)

Monel

*B7 = 2SPDT Switching Elements

H1 = Hastelloy C / ¼”

C6 = 1SPDT

BSP(F)

Adjustable Differential

H2 = Hastelloy C / ¼”

NPT(F)

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

N1 = Monel / ¼” BSP(F) N2 = Monel / ¼” NPT(F)
More options available, please contact sales office

eg. A high proof high range flameproof switch with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, fixed differential without scale, having 0.1 bar to 1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & SS316L diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

P1

P01

A1

S1

2

Please specify full model number to avoid ambiguity.

57 Bulletin No. KA231020

FC/FE LOW PRESSURE RANGES FC
PRESSURE CAPSULE DETAILS

11 10
8 7
6
5 4 3
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.71) 126.0 (4.96)

No. Description

9

1. Pressure port (S.S.)* 2. Support spring (S.S.)

3. Bottom flange (S.S.)

4. Support plate (Aluminium)

5. Diaphragm (Neoprene)

6. Gasket (Nitrile)

7. Top plate (Aluminium)

8. Top flange (S.S.)

2

9. Plunger (Aluminium) 10. Top flange screw (S.S.)

11. Sealing ‘O’ ring (Nitrile)

1

*Pressure port is welded with flange

Cable Entry 1/2″ NPT(F)(Option avail.)

110.0 (4.33)

26.0 (1.02)

Ø7 (Ø 0.27), Mounting Holes 2 Nos

228.0 (8.98) 168.0 (6.61)

Bulletin No. KA231020

Ø130.0 (Ø5.1)

Pressure Port 1/4″BSP(F)
34

Ø130.0

(Ø5.1)

APPROX. DIMENSIONS IN

mm inches

57

FC/FE LOW PRESSURE RANGES FE

PRESSURE CAPSULE DETAILS

11 10 8 7
6
5 4 3
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING
145 (5.7)

126 (4.96)

No. Description 1. Pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange (S.S.)

9

4. Support plate (Aluminium)

5. Diaphragm (Neoprene)

6. Gasket (Nitrile)

7. Top plate (Aluminium)

8. Top flange (S.S.)

9. Plunger (Aluminium)

10. Top flange screw (S.S.)

11. Sealing ‘O’ ring (Nitrile)

2

*Pressure port is welded with flange

1

Cable Entry
1/2″ NPT(F) (Option avail.)

110.0 (4.33)

26.0 (1.02)

188 (7.40)

128 (5.03)

Ø7, Mounting Holes 2 Nos
Ø130.0 (5.11)

35

Mounting Nut

1/4″BSP(F) Pressure Port

3/4″ BSP(M)

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE LOW PRESSURE RANGES
RANGE SELECTION TABLE

Range Code L02

Range mbar (“wc)
1.5 to 15 (0.602 to 6.021)

Differential* mbar (“wc)
Approximate Maximum for “A1”
microswitch
3.0 (1.205)

Maximum Working Pressure bar (psi)
2.0 (29.00)

L03

5 to 25 (2.009 to 10.046)

5.0 (2.009)

2.0 (29.00)

L05

10 to 50 (4.018 to 20.093)

5.0 (2.009)

2.0 (29.00)

L10

10 to 100 (4.018 to 40.186)

5.0 (2.009)

2.0 (29.00)

L15

10 to 150 (4.018 to 60.280)

10.0 (4.019)

2.0 (29.00)

L25

20 to 250 (8.037 to 100.460)

10.0 (4.019)

2.0 (29.00)

L35

50 to 350 (20.093 to 140.653)

25.0 (10.046)

2.0 (29.00)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

36

HOW TO ORDER FLAMEPROOF LOW RANGE PRESSURE SWITCHES

LOW PRESSURE FC/FE RANGES

37

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.250 1.750

Grey CI SS

4.650 4.140 4.740 4.230

*Not available in FE models

P 1 = pressure switch, fixed differential without scale
P2 = pressure switch, fixed differential with scale in mbar
P3 = pressure switch, fixed differential with scale in “wc

L02 = (1.5 – 15) L03 = (5 – 25) L05 = (10 – 50) L10 = (10 – 100) L15 = (10 – 150) L25 = (20 – 250) L35 = (50 – 350)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General purpose microswitch rated at 15 A; 250 VAC
*A6 = elements with adjustable deadband

S1 =

0 =

SS316 / ¼” BSP(F) Neoprene

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

2 = SS316L

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

More options available, please contact sales office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having 5 mbar to 25 mbar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

P1

L03

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE LOW RANGE HIGH PROOF PRESSURE SWITCHES FC

PRESSURE CAPSULE DETAILS

13 12 8 7
6
5 4 3
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING
126.0 (4.96)

145.0 (5.71)

No. Description 1. Pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange ( S.S.)*

4. Support plate (S.S.)

5. Diaphragm ( Neoprene)

6. Gasket (Nitrile) 10 7. Top plate (S.S.)

8. Top flange ( S.S.)*

9. Transfer pin (S.S.)

11

10. ‘O’ ring (Nitrile) 11. Sealing diaphragm (Nitrile)

9 12. Top flange screw (S.S.)

2 13. Sealing ‘O’ ring (Nitrile)

1

*Pressure ports are welded with flange

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

110.0 (4.33) 26.0
(1.02)

235 (9.25)

Ø7, MOUNTING HOLES 2 NOS

175 (6.88)

Bulletin No. KA231020

65.0 (2.55)

1/4″ BSP (F) PRESSURE PORT

MOUNTING NUT

38

3/4″ BSP

Ø130

(5.11) APPROX. DIMENSIONS IN

mm inches

57

FC/FE LOW RANGE HIGH PROOF PRESSURE SWITCHES FE

PRESSURE CAPSULE DETAILS

13 12 8 7

6
5 4 3

Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

145.0 (5.71)

126.0 (4.96)

No. Description 1. Pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange ( S.S.)*

4. Support plate (S.S.)

10

5. Diaphragm ( Neoprene)

6. Gasket (Nitrile)

7. Top plate (S.S.)

8. Top flange ( S.S.)*

11

9. Transfer pin (S.S.)

9 2 1

10. ‘O’ ring (Nitrile) 11. Sealing diaphragm (Nitrile) 12. Top flange screw (S.S.) 13. Sealing ‘O’ ring (Nitrile)

*Pressure ports are welded with flange

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

110.0 (4.33)
26.0
(1.02)

185 (7.28)

125 (4.92)

Ø7, MOUNTING HOLES 2 NOS

65.0 (2.55)

1/4″ BSP (F) PRESSURE PORT
39

3/4″ BSP

MOUNTING NUT

Ø130

(5.11) APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE LOW RANGE HIGH PROOF PRESSURE SWITCHES

RANGE SELECTION TABLE

Range Code

Range mbar (“wc)

N02

1.5 to 15 (0.602 to 6.02)

Differential* mbar (” wc)
Approximate Maximum for “A1”
microswitch
3.0 (1.205)

Maximum Working Pressure
bar (psi) 20.0
(290.075)

N03

5 to 25 (2.009 to 10.046)

5.0 (2.009)

20.0 (290.075)

N05

10 to 50 (4.018 to 20.093)

5.0 (2.009)

20.0 (290.075)

N10

10 to 100 (4.018 to 40.186)

10.0 (4.018)

20.0 (290.075)

N15

10 to 150 (4.018 to 60.270)

10.0 (4.018)

20.0 (290.075)

N25

20 to 250 (8.03 to 100.460)

15.0 (6.027)

20.0 (290.075)

N35

50 to 350 (20.093 to 140.653)

35.0 (14.060)

20.0 (290.075)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

40

75

HOW TO ORDER FLAMEPROOF LOW RANGE HIGH PROOF PRESSURE SWITCHES

LOW RANGE HIGH PROOF PRESSURE FC/FE SWITCHES

41

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Enclosure FC FE

Aluminium 3.950 3.450

Grey CI SS

6.350 5.850 6.450 5.950

*Not available in FE models

P1 = pressure switch, fixed differential without scale
P2 = pressure switch, fixed differential with scale in mbar
P3 = pressure switch, fixed differential with scale in “Wc

N02 = (1.5 – 15) N03 = (5 – 25) N05 = (10 – 50) N10 = (10 – 100) N15 = (10 – 150) N25 = (20 – 250) N35 = (50 – 350)

A1 = General purpose microswitch rated at 15 A; 250 VAC
*A6 = elements with adjustable deadband

S1 =

0 =

SS316 / ¼” BSP(F) Neoprene

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

2 = SS316L

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

For adjustable differential please select microswitches A6 or C6 in group 6

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

More options available, please contact sales office

eg. Flameproof switch for gas group, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, fixed differential without scale, having 5 mbar to 25 mbar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

FC

1

Please specify full model number to avoid ambiguity.

Group 4 P1

Group 5 N03

Group 6 A1

Group 7 S1

Group 8 0

Bulletin No. KA231020

FC/FE ULTRA LOW RANGE PRESSURE SWITCHES FC

PRESSURE CAPSULE DETAILS

13 12 8 7
6
5 4 3
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING
126.0 (4.96)

145.0 (5.71)

No. Description 1. Pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange ( S.S.)*

4. Support plate (S.S.)

5. Diaphragm ( Neoprene)

6. Gasket (Nitrile) 10 7. Top plate (S.S.)

8. Top flange ( S.S.)*

9. Transfer pin (S.S.)

11

10. ‘O’ ring (Nitrile) 11. Sealing diaphragm (Nitrile)

9 12. Top flange screw (S.S.)

2 13. Sealing ‘O’ ring (Nitrile)

1

*Pressure ports are welded with flange

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

110.0 (4.33) 26.0
(1.02)

235 (9.25)

Ø7, MOUNTING HOLES 2 NOS

175 (6.88)

Bulletin No. KA231020

77.5 (3.05)

1/4″ BSP (F) PRESSURE PORT

MOUNTING NUT

42

3/4″ BSP

Ø155

(6.10) APPROX. DIMENSIONS IN

mm inches

57

FC/FE ULTRA LOW RANGE PRESSURE SWITCHES FE

PRESSURE CAPSULE DETAILS

13 12 8 7
6
5 4 3
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

126.0 (4.96)

145.0 (5.71)

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

No. Description 1. Pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange ( S.S.)*

4. Support plate (S.S.)

10

5. Diaphragm ( Neoprene)

6. Gasket (Nitrile)

7. Top plate (S.S.)

8. Top flange ( S.S.)*

11

9. Transfer pin (S.S.)

9 2 1

10. ‘O’ ring (Nitrile) 11. Sealing diaphragm (Nitrile) 12. Top flange screw (S.S.) 13. Sealing ‘O’ ring (Nitrile)

*Pressure ports are brazed with flange

110.0 (4.33)
26.0
(1.02)

185 125 (7.28) (4.92)

Ø7, MOUNTING HOLES 2 NOS

77.5 (3.05)

1/4″ BSP (F) PRESSURE PORT
43

3/4″

MOUNTING

BSP

NUT

Ø155

(6.10) APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE ULTRA LOW RANGE PRESSURE SWITCHES

RANGE SELECTION TABLE

Range Code

Range mbar (“Wc) (Falling set point)

U15

0.4 to 1.5 (0.16 to 0.603)

Differential* mbar (“Wc)
Approximate Maximum for “A1”
microswitch
0.40 (0.16)

Maximum Working Pressure
bar (psi) 0.5
(7.25)

U25

0.5 to 2.5 (0.20 to 1.100)

0.60 (0.24)

0.5 (7.25)

U40

1.0 to 4.0 (0.40 to 1.067)

0.80 (0.32)

0.5 (7.25)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

44

75

HOW TO ORDER FLAMEPROOF ULTRA LOW RANGE PRESSURE SWITCHES

ULTRA LOW RANGE PRESSURE FC/FE SWITCHES

45

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 3.920 3.420

Grey CI SS

6.310 5.810 6.420 5.920

*Not available in FE models

P1 = pressure switch, fixed differential without scale
P2 = pressure switch, fixed differential with scale in mbar
P3 = pressure switch, fixed differential with scale in “Wc

U15 = (0.4 – 1.5) U25 = (0.5 – 2.5) U40 = (1.0 – 4.0)

A1 = General

S1 =

purpose microswitch SS316 /

rated at 15 A; 250 ¼” BSP(F)

VAC *A6 = elements

S2 = SS316 /

with adjustable

¼” NPT(F)

deadband

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

0 = Neoprene 1 = PTFE

For adjustable differential please select microswitches A6 or C6 in group 6

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

More options available, please contact sales office

eg. Flameproof switch for gas group, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, fixed differential without scale, having 0.16 to 0.60 “Wc pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

FC

1

Please specify full model number to avoid ambiguity.

Group 4 P1

Group 5 U15

Group 6 A1

Group 7 S1

Group 8 0

Bulletin No. KA231020

FC/FE HYDRAULIC DIAPHRAGM RANGES FC
PRESSURE CAPSULE DETAILS

No. Description 1. Pressure Port

4

2. PTFE O-Ring 3. Diaphragm

3

4. Conical Plunger

2

Note : wetted parts are mentioned in italics.

1

INSTALLATION DRAWING
145.0 (5.71)
126.0 (4.96)

CABLE ENTRY 1/2″ NTP(F) (Options Avail.)

110.0 (4.33)

26.0 (1.02)

220.0 (8.66) 160.0 (6.29)

Bulletin No. KA231020

Ø7 (Ø 0.27), Mounting Holes, 2nos
PRESSURE PORT 1/4″ BSPF Std. (Options Avail.)
46

A/F 19 (A/F 0.74)

APPROX. DIMENSIONS IN

mm inches

FC/FE HYDRAULIC DIAPHRAGM RANGES FE
PRESSURE CAPSULE DETAILS

4
3 2

Note : wetted parts are mentioned in italics. 1

INSTALLATION DRAWING
145 (5.7)

126 (4.96)

No. Description 1. Pressure Port 2. PTFE O-Ring 3. Diaphragm 4. Conical Plunger

CABLE ENTRY 1/2″ NTP(F) (Options Avail.)

110 (4.33)

26 (1.02)

177 (6.96)

117 (4.60)

Ø7, Mounting Holes 2 nos
A/F 19 (0.74)

1/4″ BSP(F) PRESSURE PORT

47

50.8

(2.0)

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE HYDRAULIC DIAPHRAGM RANGES
RANGE SELECTION TABLE

Range Code H1T

Range bar (psi) 0.5 – 10 (7.25 – 145.04)

Differential* bar (psi)
Approximate Maximum for “A8”
microswitch
1 (14.50)

Maximum Working Pressure
bar (psi) 150
(2175.51)

H2T

2 – 20 (29.00 – 290.07)

2 (29.00)

200 (2900.76)

H4T

5 – 40 (72.52 – 580.15)

5 (72.52)

200 (2900.76)

H1H

10 – 100 (146.04 – 1450.38)

12 (174.05)

200 (2900.76)

H2H

7 – 200 (101.52 – 2900.76)

24 (348.09)

400 (5801.52)

H4H

40 – 400 (580.15 – 5801.52)

50 (725)

500 (7251.88)

H7H

70 – 700 (1015.26 – 10152.64)

60 (870)

800 (11603)

H1K

100 – 1000 (1450.37 – 14503.77)

70 (1015.26)

1100 (15954.15)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Note: Welded diaphragm also available as shown

Bulletin No. KA231020

48

57

HOW TO ORDER FLAMEPROOF HYDRAULIC RANGE PRESSURE SWITCHES

HYDRAULIC DIAPHRAGM FC/FE RANGES

49

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.210 1.710

Grey CI SS

4.620 4.120 4.720 4.220

*Not available in FE models

P 1 = pressure switch, fixed differential without scale
P2 = pressure switch, fixed differential with scale in bar
P3 = pressure switch, fixed differential with scale in psi

H1T = (0.5 – 10) H2T = (2 – 20) H4T = (5 – 40) H1H = (10 – 100) H2H = (7 – 200) H4H = (40 – 400) H7H = (70 – 700) H1K = (100 – 1000)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General

S1 =

0 =

purpose microswitch SS316 / ¼” BSP(F) Neoprene

rated at 15 A; 250 VAC

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A6 = elements with adjustable deadband

S3 = (welded diaphragm) SS316 / 1″ BSP(M)

2 = SS 316L

*A7 = 2SPDT

S4 =

switching elements SS316 / 1/2″

3 = Hastelloy C

A8 = General purpose NPT(F)

4 =

microswitch rated at 5 A, 250 VAC; 5 A, 28 VDC
*B7 = 2SPDT Switching Elements
C6 = 1SPDT

S5 = SS316 / 1/2″ NPT(M)
H1 = Hastelloy C / ¼” BSP(F)

Monel 5 = Titanium 6 = Tantalum

Adjustable Differential

H2 = Hastelloy C / ¼” NPT(F)

7 = Inconel

N1 = Monel / ¼” BSP(F)

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

N2 = Monel / ¼” NPT(F)
More options available, please contact sales office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having 5 bar to 40 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & SS316L diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

P1

H4T

A1

S1

2

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE FLANGED PRESSURE SWITCHES FC

PRESSURE CAPSULE DETAILS
5 4

No. Description 1. ANSI FLANGE to your specifications please refer table for possible combinations 2. Sealing Ring 3. Diaphragm 4. Disc 5. Plunger
3 2

Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING

225 (8.85)

126 (4.96)

145 (5.7)

1
Cable Entry 1/2″ NPT(F) (Options Avail.)
Ø7, Mounting Holes 2nos

110 (4.33)

26 (1.02)

165 (6.49)

35.1 (1.38)

Note : Other flange options are also available Bulletin No. KA231020

Ø50.8 (Ø2) Ø158.7
(Ø6.2)

1″NB 2500 RF ANSI FLANGE

50

APPROX. DIMENSIONS IN

mm inches

57

FC/FE FLANGED PRESSURE SWITCHES FE

PRESSURE CAPSULE DETAILS
5 4

No. Description 1. ANSI FLANGE to your specifications please refer table for possible combinations 2. Sealing Ring 3. Diaphragm 4. Disc 5. Plunger
3 2

Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING 145.0

126

(5.7)

(4.96)

1

CABLE ENTRY 1/2″ NPT(F) (Options Avail.)

110 (4.33)

26 (1.02)

205 (8.07)

145 (5.70)

Ø7, Mounting Holes 2 nos
1″NB 2500 RF ANSI FLANGE
Note : Other flange options are also available

51

Ø158.7

(Ø6.24)

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

35.1 (1.38)

FC/FE FLANGED PRESSURE SWITCHES

RANGE SELECTION TABLE

Range Code

Range bar (psi)

Differential* bar (psi)

Approximate Maximum for “A1″ microswitch

H01

0.1 to 1.0 (1.45 to 14.50)

0.10 (1.45)

H02

0.1 to 1.5 (1.45 to 21.76)

0.12 (1.74)

H03

0.2 to 2.6 (2.90 to 37.71)

0.15 (2.17)

H04

0.2 to 3.6 (2.90 to 52.21)

0.20 (2.90)

H07

0.5 to 7.0 (7.25 to 101.53)

0.40 (5.80)

H10

0.5 to 10.0 (7.25 to 145.04)

0.60 (8.70)

H15

1.0 to 15.0 (14.50 to 217.56)

1.00 (14.50)

H30

5.0 to 25.0 (72.52 to 362.59)

1.50 (21.75)

H4T

5.0 to 40.0 (72.52 to 580.15)

5.0 (72.52)

H1H

10.0 to 100.0 (145.04 to 1450.38)

12.0 (174.05)

H2H

7.0 to 200.0 (101.53 to 2900.75)

24.0 (348.09)

H4H

40.0 to 400.0 (580.151 to 5801.51)

70.0 (1015.26)

Maximum Working Pressure bar (psi)
As per the class of flange
Please consult Sales Office
in case you need clarification on availability
of maximum working pressure for a
particular range.

Note:

RF = Raised Face FF = Flat Face

1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.

2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.

If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

RANGE AVAILABILITY AS PER BORE SIZES

H01 to H04 H07

H10

H15

H30

1″ NB

NA

Yes

Yes

Yes

Yes

2” NB

Yes

Yes

Yes

Yes

Yes

Bulletin No. KA231020

52

H4T to H2H Yes Yes

Note : When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. Please refer note no. 7 on page no. 122.

HOW TO ORDER FLAMEPROOF FLANGED PRESSURE SWITCHES

FLANGED PRESSURE FC/FE SWITCHES

53

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Flange Size and Material

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium Grey CI SS

Switch weight varies with flange,
please consult sales office

*Not available in FE models

A1 = ANSI Flanged pressure switch, fixed differential without scale
A2 = ANSI Flanged pressure switch, fixed differential with scale in bar
A3 = ANSI Flanged pressure switch, fixed differential with scale in psi

H01 = 0.1 – 1.0 H02 = 0.1 – 1.5 H03 = 0.2 – 2.6 H04 = 0.2 – 3.6 H07 = 0.5 – 7.0 H10 = 0.5 – 10.0 H15 = 1.0 – 15.0 H30 = 5.0 – 25.0 H4T = 5 – 40 H1H = 10 – 100 H2H = 7 – 200 H4H = 40 – 400

A1 = General

Please refer to

purpose microswitch the flange code

rated at 15 A; 250 table on Page

VAC

nos. 118 & 119

*A6 = elements with adjustable

for selection of the flange

deadband

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

0 = Neoprene 1 = PTFE 2 = SS316L 3 = Hastelloy C 4 = Monel 400 5 = Titanium 6 = Tantalum

For adjustable differential please select microswitches A6 or C6 in group 6

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

Please contact sales office for additional information

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing with an ANSI flange, having 0.5 bar to 7 bar pressure range, with 15 Amp. microswitch, 1″ NB 150# RF SS316L flange & SS316L diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

A1

H07

A1

AC

2

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE HIGH RANGE PRESSURE DIFFERENCE SWITCHES FC
PRESSURE CAPSULE DETAILS

8 7 6 5 4 3 2 1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.71) 126.0 (4.96)

No. Description 1. Pressure Housing 2. HP Plunger (SS316) 3. Disc 4. Diaphragm 5. LP Plunger (SS316) 6. Junction Plate 7. Sealing ‘O’ Ring (PTFE) 8. Sealing diaphragms (PTFE) 9. ‘O’ ring (PTFE)
10. CSK screw (SS) 9 10

Cable Entry 1/2″ NPT(F) (Options Avail.)

110.0 (4.33)
26.0 (1.02)

227.0 (8.94) 167.0 (6.57)

34.5 (1.36)
Low Pressure Port 1/4″ BSP(F) Bulletin No. KA231020

Ø7 (Ø 0.27), Mounting Holes, 2nos
High Pressure Port 1/4″ BSP(F)
54

APPROX. DIMENSIONS IN

mm inches

FC/FE HIGH RANGE PRESSURE DIFFERENCE SWITCHES FE
PRESSURE CAPSULE DETAILS

8 7
6 5 4 3 2 1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145 (5.7)

126 (4.96)

No. Description 1. Pressure Housing 2. HP Plunger (SS316) 3. Disc 4. Diaphragm 5. LP Plunger (SS316) 6. Junction Plate 7. Sealing ‘O’ Ring (PTFE) 8. Sealing diaphragms (PTFE) 9. ‘O’ ring (PTFE)
10. CSK screw (SS) 9 10

Cable Entry 1/2″ NPT(F) (Options Avail.)

110 (4.33)

26 (1.02)

186 (7.32)

126 (4.96)

Ø7, Mounting Holes 2 nos

34.5 (1.35)

1/4″ BSP(F) Low Pressure Port

50.8 (2.0)

1/4″ BSP(F) High Pressure Port

57

55

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE HIGH RANGE PRESSURE DIFFERENCE SWITCHES
RANGE SELECTION TABLE

Range Code
H01 H02 H03 H04

Range bar (psi)
0.1 to 1.0 (1.45 to 14.50)
0.1 to 1.5 (1.45 to 21.76)
0.2 to 2.6 (2.90 to 37.71)
0.2 to 3.6 (2.90 to 52.21)

Differential* bar (psi) Approximate Maximum for “A1” microswitch 0.12 (1.74)
0.20 (2.90)
0.20 (2.90)
0.30 (4.35)

Maximum Working Pressure
bar (psi)
12.0 (174.05)
12.0 (174.05)
12.0 (174.05)
12.0 (174.05)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

56

57

HOW TO ORDER FLAMEPROOF HIGH RANGE PRESSURE DIFFERENCE SWITCHES

HIGH RANGE PRESSURE DIFFERENCE FC/FE SWITCHES

57

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.030 1.530

Grey CI SS

4.430 3.930 4.560 4.060

*Not available in FE models

D1 =

H01 =

pressure

(0.1 – 1.0)

difference switch, fixed differential without scale

H02 = (0.1 – 1.5)

D2 = pressure

H03 = (0.2 – 2.6)

difference switch, H04 =

fixed differential (0.2 – 3.6)

with scale in bar

D3 = pressure difference switch, fixed differential with scale in psi

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General purpose microswitch rated at 15 A; 250 VAC
*A6 = elements with adjustable deadband

S1 =

0 =

SS316 / ¼” BSP(F) Neoprene

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

More options available, please contact sales office

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

For additional wetted part materials please contact Sales Office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure difference switch, having 0.1 bar to 1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

D1

H01

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE HIGH RANGE DP FC
PRESSURE CAPSULE DETAILS

3 2

Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.7) 126.0
(5.0)

CABLE ENTRY
1/2″ NPT(F) (Options Avail.)

No. Description 1. Pressure Housing 2. Diaphragm 3. Plunger 4. O-Ring 5. Disc
1 4 5
110.0 (4.3) 26.0
(1.0)

Ø7 (Ø 0.27), Mounting Holes, 2nos

255.0 (10.04) 195.0 (7.67)

HIGH PRESSURE PORT Bulletin No. KA231020

LOW PRESSURE PORT
58

PRESSURE PORT

1/4″ BSPF

Std. (Options Avail.)

50.8 Sq. (2.0)

APPROX. DIMENSIONS IN

mm inches

PRESSURE CAPSULE DETAILS

HIGH RANGE DP FC/FE FE

3 2

Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
126.0 (4.96)

145.0 (5.7)

No. Description 1. Pressure Housing 2. Diaphragm 3. Plunger 4. O-Ring 5. Disc
1 4
5

110.0 (4.33)

26.0 (1.02)

150.0 (5.90)
210.0 (8.26)

Ø7, Mounting Holes 2 Nos.
1/4″ BSP(F) High Pressure Port

1/4″ BSP(F)
Low Pressure Port

59

HIGH

50.8

(2.0)
APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE HIGH RANGE DP
RANGE SELECTION TABLE

Range Code D01

Range bar (psi) 0.1 to 1.0
(1.45 to 14.50)

Differential* bar (psi)
Approximate Maximum for “A1”
microswitch
0.10 (1.45)

Maximum Working Pressure bar (psi)
70.0 (1015.26)

D02

0.1 to 1.5 (1.45 to 21.76)

0.15 (2.17)

70.0 (1015.26)

D03

0.2 to 2.6 (2.90 to 37.71)

0.2 (2.90)

70.0 (1015.26)

D04

0.2 to 3.6 (2.90 to 52.21)

0.4 (5.80)

70.0 (1015.26)

D07

0.5 to 7.0 (7.25 to 101.53)

0.6 (8.70)

70.0 (1015.26)

D10

0.5 to 10.0 (7.25 to 145.038)

1.0 (14.50)

70.0 (1015.26)

D15

1.0 to 15.0 (14.50 to 217.56)

1.5 (21.75)

70.0 (1015.26)

D30

5.0 to 25.0 (72.52 to 362.59)

2.0 (29.00)

70.0 (1015.26)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

60

57

HOW TO ORDER FLAMEPROOF HIGH RANGE DP SWITCHES

61

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.730 2.230

Grey CI SS

5.120 4.620 5.250 4.720

*Not available in FE models

D1 =

D01 =

pressure

(0.1 – 1.0)

difference switch, fixed differential without scale

D02 (0.1 – 1.5)

D2 = pressure

D03 = (0.2 – 2.6)

difference switch, D04 =

fixed differential (0.2 – 3.6)

with scale in bar D07 =

D3 =

(0.5 – 7.0)

pressure difference switch, fixed differential

D10 = (0.5 – 10.0)

with scale in psi D15 =

(1.0 – 15.0)

D30 = (5.0 – 25.0)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General

S1 =

0 =

purpose microswitch SS316 / ¼” BSP(F) Neoprene

rated at 15 A; 250 VAC

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

A6 = elements with adjustable deadband
A7 = 2SPDT switching elements
A8 = General purpose microswitch rated at 5

N1 = Monel / ¼” BSP(F)
N2 = Monel / ¼” NPT(F)
H1 = Hastelloy C / ¼” BSP(F)

2 = SS316L 4 = Monel 7 = Inconel

A, 250 VAC; 5 A, 28 VDC

H2 = Hastelloy C / ¼”

*B7 = 2SPDT

NPT(F)

Switching Elements

C6 = 1SPDT Adjustable Differential

More options available, please contact sales office

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

For additional wetted parts please contact Sales Office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure difference switch, having 0.1 bar to 1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

D1

D01

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

HIGH RANGE DP FC/FE

Bulletin No. KA231020

FC/FE HYDRAULIC RANGE DP FC
PRESSURE CAPSULE DETAILS

3 2

Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.7) 126.0
(5.0)

CABLE ENTRY
1/2″ NPT(F) (Options Avail.)

No. Description 1. Pressure Housing 2. Diaphragm 3. Plunger 4. O-Ring 5. Disc
1 4 5
110.0 (4.3) 26.0
(1.0)

Ø7 (Ø 0.27), Mounting Holes, 2nos

255.0 (10.04) 195.0 (7.67)

HIGH PRESSURE PORT Bulletin No. KA231020

LOW PRESSURE PORT
62

PRESSURE PORT

1/4″ BSPF

Std. (Options Avail.)

50.8 Sq. (2.0)

APPROX. DIMENSIONS IN

mm inches

57

FC/FE HYDRAULIC RANGE DP FE
PRESSURE CAPSULE DETAILS

3 2

Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
126.0 (4.96)

145.0 (5.7)

No. Description 1. Pressure Housing 2. Diaphragm 3. Plunger 4. O-Ring 5. Disc
1 4
5

110.0 (4.33)

26.0 (1.02)

150.0 (5.90)
210.0 (8.26)

Ø7, Mounting Holes 2 Nos.
1/4″ BSP(F) High Pressure Port

1/4″ BSP(F) Low Pressure Port

63

HIGH

50.8

(2.0)
APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE HYDRAULIC RANGE DP
RANGE SELECTION TABLE

Range Code H1U

Range bar (psi) 0.1 to 1.0 (1.45 to 14.50)

Differential* bar (psi)
Approximate Maximum for “A1”
microswitch
0.30 (4.35)

Maximum Working Pressure
bar (psi) 150.0
(2175.57)

H2U

0.1 to 1.5 (1.45 to 21.75)

0.30 (4.35)

150.0 (2175.57)

H3U

0.2 to 2.6 (2.90 to 37.70)

0.40 (5.8)

150.0 (2175.57)

H4U

0.2 to 3.6 (2.90 to 52.21)

0.60 (8.70)

150.0 (2175.57)

H7U

0.5 to 7.0 (7.25 to 101.53)

1.0 (14.50)

150.0 (2175.57)

D1T

0.5 to 10.0 (7.25 to 145.04)

1.5 (21.75)

200.0 (2900.75)

D2T

1.0 to 15.0 (14.50 to 217.56)

3.0 (43.51)

200.0 (2900.75)

D3T

5.0 to 25.0 (72.52 to 362.60)

4.0 (58.01)

200.0 (2900.75)

D4T

5.0 to 40.0 (72.52 to 580.15)

5.0 (72.52)

400.0 (5801.51)

D1H

10 to 100 (145.4 to 1450.38)

12.0 (174.04)

400.0 (5801.51)

D2H

7.0 to 200 (101.53 to 2900.75)

24.0 (348.10)

400.0 (5801.51)

D4H

40.0 to 400 (580.151 to 5801.51)

70.0 (1015.26)

500.0 (7251.89)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

64

HOW TO ORDER FLAMEPROOF HYDRAULIC RANGE DP SWITCHES

HYDRAULIC RANGE FC/FE DP

65

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 1.950 1.450

Grey CI SS

4.350 3.950 4.450 3.950

*Not available in FE models

D1 = pressure

H1U = (0.1 – 1.0)

difference switch, fixed differential without scale

H2U = (0.1 – 1.5) H3U =

D2 =

(0.2 – 2.6)

pressure difference switch, fixed differential

H4U = (0.2 – 3.6)

with scale in bar H7U =

(0.5 – 7.0)

D3 = pressure difference switch,

D1T = (0.5 – 10.0)

fixed differential D2T =

with scale in psi (1.0 – 15.0)

D3T =

(5.0 – 25.0)

D4T = (5.0 – 40.0)

D1H = (10 – 100)

D2H = (7.0 – 200)

For adjustable differential please select microswitches A6 or C6 in group 6

D4H = (40 – 400)

A1 = General

S1 =

0 =

purpose microswitch SS316 / ¼” BSP(F) Neoprene

rated at 15 A; 250 VAC

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A6 = elements with adjustable deadband

H1 = Hastelloy C / ¼” BSP(F)

2 = SS 316L

*A7 = 2SPDT

H2 =

switching elements Hastelloy C / ¼”

3 = Hastelloy C

A8 = General purpose NPT(F)

4 =

microswitch rated at 5 A, 250 VAC; 5 A, 28 VDC
*B7 = 2SPDT Switching Elements

N1 = Monel / ¼” BSP(F) N2 = Monel / ¼” NPT(F)

Monel

C6 = 1SPDT Adjustable Differential

More options available, please contact sales office

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

For additional wetted parts please contact Sales Office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure difference switch, having 0.1 bar to 1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

D1

H1U

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE LOW RANGE PRESSURE DIFFERENCE SWITCHES FC

PRESSURE CAPSULE DETAILS

14 13 12 8 7 6
5 4 3
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.71) 126.0 (4.96)

No. Description 1. High pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange (S.S.)

4. Support plate (Aluminium)

5. Diaphragm ( Neoprene)

6. Gasket (Nitrile)

7. Top plate (Aluminium)

10

8. Top flange (M.S.)*

9. Transfer pin (Aluminium)

10. ‘O’ ring (Nitrile)

11 9

11. Sealing diaphragm (Nitrile) 12. Top flange screw (S.S.) 13. Sealing ‘O’ ring (Nitrile)

2 14. Low pressure port (S.S.)*

1

• Pressure ports are welded with flange

Cable Entry 1/2″ NPT(F)(Option avail.)

110.0 (4.33)

26.0 (1.02)

228.0 (8.98) 168.0 (6.61)

1/4″BSP(F) Low Pressure Port

Ø7 (Ø 0.27), Mounting Holes, 2nos

Bulletin No. KA231020

Ø130.0 (Ø5.1)

1/4″ BSP(F) High Pressure Port

66

Ø130.0

(Ø5.1)

APPROX. DIMENSIONS IN

mm inches

FC/FE LOW RANGE PRESSURE DIFFERENCE SWITCHES FE

PRESSURE CAPSULE DETAILS

14 13 12 8 7 6
5 4 3
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

145.0 (5.71)

126.0 (4.96)

No. Description 1. High pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange (S.S.)

4. Support plate (Aluminium)

5. Diaphragm ( Neoprene)

6. Gasket (Nitrile)

7. Top plate (Aluminium)

10

8. Top flange (M.S.)*

9. Transfer pin (Aluminium)

10. ‘O’ ring (Nitrile)

11. Sealing diaphragm (Nitrile)

11

12. Top flange screw (S.S.)

9

13. Sealing ‘O’ ring (Nitrile)

14. Low pressure port (S.S.)*

2

• Pressure ports are welded with flange

1

Cable Entry
1/2″ NPT(F) (Option avail.)

110.0 (4.33)

26.0 (1.02)

128.0 (5.03)
188.0 (7.40)

1/4″BSP(F) Low Pressure Port

Ø7
Mounting Holes 2 Nos.

Ø130.0 (Ø5.1)

1/4″BSP(F) High Pressure Port

Mounting Nut

3/4″ BSP(M)

APPROX. DIMENSIONS IN

mm inches

57

67

Bulletin No. KA231020

FC/FE LOW RANGE PRESSURE DIFFERENCE SWITCHES
RANGE SELECTION TABLE

Range Code L02

Range mbar (“wc)
1.5 to 15 (0.60 to 6.030)

Differential* mbar (” wc)
Approximate Maximum for “A1”
microswitch
3.0 (1.205)

Maximum Working Pressure
bar (psi) 2.0
(29.00)

L03

5 to 25 (2.009 to 10.047)

5.0 (2.009)

2.0 (29.00)

L05

10 to 50 (4.018 to 20.093)

5.0 (2.009)

2.0 (29.00)

L10

10 to 100 (4.018 to 40.180)

5.0 (2.009)

2.0 (29.00)

L15

10 to 150 (4.015 to 60.280)

10.0 (4.018)

2.0 (29.00)

L25

20 to 250 (8.037 to 100.466)

10.0 (4.018)

2.0 (29.00)

L35

50 to 350 (20.093 to 140.650)

35.0 (14.065)

2.0 (29.00)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

68

57

HOW TO ORDER FLAMEPROOF LOW RANGE PRESSURE DIFFERENCE SWITCHES

LOW RANGE PRESSURE DIFFERENCE FC/FE SWITCHES

69

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.250 1.750

Grey CI SS

4.650 4.150 4.730 4.250

*Not available in FE models

D1 =

L02 =

pressure

(1.5 – 15)

difference switch, fixed differential without scale

L03 = (5 – 25)

D2 = pressure

L05 = (10 – 50)

difference switch, L10 =

fixed differential (10 – 100)

with scale in mbar

L15 = (10 – 150)

D3 = pressure difference switch,

L25 = (20 – 250)

fixed differential L35 =

with scale in “wc (50 – 350)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General purpose microswitch rated at 15 A; 250 VAC
*A6 = elements with adjustable deadband

S1 =

0 =

SS316 / ¼” BSP(F) Neoprene

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

More options available, please contact sales office

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

For additional wetted parts please contact Sales Office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having 0.1 bar to 1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

D1

L03

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE LOW DP HIGH PROOF PRESSURE DIFFERENCE SWITCHES FC

PRESSURE CAPSULE DETAILS

14 13 12 8 7
6
5 4 3
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

145.0

(5.71)

126.0

(4.96)

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

No. Description

1. High pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange (S.S.)*

4. Support plate (S.S.)

5. Diaphragm (Neoprene)

10

6. Gasket (Nitrile) 7. Top plate (S.S.)

8. Top flange ( S.S.)*

9. Transfer pin (S.S.)

11 9 2 1

10. ‘O’ ring (Nitrile) 11. Sealing diaphragm (Nitrile) 12. Top flange screw (S.S.) 13. Sealing ‘O’ ring (Nitrile) 14. Low pressure port (S.S.)*

*Pressure ports are welded with flange

110.0 (4.33) 26.0
(1.02)

235 (9.25)

Ø7, MOUNTING HOLES 2 NOS

175 (6.88)

1/4″ BSP (F) LOW PRESSURE PORT

20.0 20.0
65.0 (0.78) (0.78) (2.55)

Bulletin No. KA231020

1/4″ BSP (F) HIGH PRESSURE PORT

70

3/4″ MOUNTING BSP NUT

Ø130

(5.11)

136

(5.35)

APPROX. DIMENSIONS IN

mm inches

57

FC/FE LOW DP HIGH PROOF PRESSURE DIFFERENCE SWITCHES FE

PRESSURE CAPSULE DETAILS

14 13 12 8 7 6
5 4 3
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
126.0 (4.96)

No. Description

1. High pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange (S.S.)*

4. Support plate (S.S.)

5. Diaphragm (Neoprene)

10

6. Gasket (Nitrile)

7. Top plate (S.S.)

8. Top flange ( S.S.)*

9. Transfer pin (S.S.)

11

10. ‘O’ ring (Nitrile)

9

11. Sealing diaphragm (Nitrile)

2

12. Top flange screw (S.S.)

1

13. Sealing ‘O’ ring (Nitrile)

14. Low pressure port (S.S.)*

*Pressure ports are welded with flange

145.0 (5.71)

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

110.0 (4.33)
26.0
(1.02)

192 132 (7.55) (5.19)

Ø7, MOUNTING HOLES 2 NOS

1/4″ BSP (F) LOW PRESSURE PORT

20.0 20.0 (0.78) (0.78)
65.0 (2.55)

1/4″ BSP (F) HIGH PRESSURE PORT
71

3/4″ BSP

MOUNTING NUT

Ø130

(5.11)

136

(5.35)

APPROX. DIMENSIONS IN

mm inches

57 Bulletin No. KA231020

FC/FE LOW DP HIGH PROOF PRESSURE DIFFERENCE SWITCHES

RANGE SELECTION TABLE

Range Code

Range mbar (“wc)

N02

1.5 to 15 (0.602 to 6.030)

Differential* mbar (” wc)
Approximate Maximum for “A1”
microswitch
3.0 (1.205)

Maximum Working Pressure
bar (psi) 20.0
(290.075)

N03

5 to 25 (2.009 to 10.046)

5.0 (2.009)

20.0 (290.075)

N05

10 to 50 (4.018 to 20.093)

5.0 (2.009)

20.0 (290.075)

N10

10 to 100 (4.018 to 40.186)

10.0 (4.018)

20.0 (290.075)

N15

10 to 150 (4.018 to 60.280)

10.0 (4.018)

20.0 (290.075)

N25

20 to 250 (8.037 to 100.466)

15.0 (6.030)

20.0 (290.075)

N35

50 to 350 (20.093 to 140.653)

35.0 (14.060)

20.0 (290.075)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

72

HOW TO ORDER FLAMEPROOF LOW DP HIGH PROOF PRESSURE DIFFERENCE SWITCHES

LOW DP HIGH PROOF PRESSURE DIFFERENCE FC/FE SWITCHES

73

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 4.230 3.730

Grey CI SS

6.630 6.130 6.720 6.220

*Not available in FE models

D1 =

N02 =

pressure

(1.5 – 15)

difference switch, fixed differential without scale

N03 = (5 – 25)

D2 = pressure

N05 = (10 – 50)

difference switch, N10 =

fixed differential (10 – 100)

with scale in mbar

N15 = (10 – 150)

D3 = pressure difference switch,

N25 = (20 – 250)

fixed differential N35 =

with scale in “wc (50 – 350)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General purpose microswitch rated at 15 A; 250 VAC
*A6 = elements with adjustable deadband

S1 =

0 =

SS316 / ¼” BSP(F) Neoprene

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

More options available, please contact sales office

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

For additional wetted parts please contact Sales Office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having 0.1 bar to 1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

D1

N03

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

Bulletin No. KA231020

FC/FE LOW P HIGH PROOF PRESSURE DIFFERENCE SWITCHES FC

PRESSURE CAPSULE DETAILS

7 6 5
4 3 2 1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.71) 126.0
(4.96)

No. Description 1. High Pressure Housing

2. Spring

3. H P Plunger

4. Diaphragm

12

5. Plunger ‘O’ ring

6. Plunger Screw

11

7. L P Plunger

10

8. Main Sealing ‘O’ ring

13

9. Low Pressure Housing 10. Sealing ‘O’ ring

9

11. Diaphragm

8

12. Small Plunger

CABLE ENTRY 1/2″ NPT(F) (Options Avail.)

110.0 (4.33)

26.0 (1.02)

235.0 (9.25)

Ø11 (0.43), Mounting Holes 4 NOS. 132 PCD (5.2″) 60/120/60 Deg. apart

175.0 (6.88)

45.0 (1.77)

57.0 (2.24)

HIGH PRESSURE PORT

1/4″ BSPF

9.5 (0.37)

75Bulletin No. KA231020

63.0 (2.48) 145.0 (5.71)

LOW PRESSURE PORT 1/4″ BSPF

Ø150.0

(Ø5.90)

APPROX. DIMENSIONS IN

mm inches

74

FC/FE LOW P HIGH PROOF PRESSURE DIFFERENCE SWITCHES FE

PRESSURE CAPSULE DETAILS

7 6 5
4 3 2 1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.71)
126.0 (4.96)

12 11 10 13 9 8
Cable Entry 1/2″ NPT(F) (Options Avail.)

No. Description 1. High Pressure Housing 2. Spring 3. H P Plunger 4. Diaphragm 5. Plunger ‘O’ ring 6. Plunger Screw 7. L P Plunger 8. Main Sealing ‘O’ ring 9. Low Pressure Housing
10. Sealing ‘O’ ring 11. Diaphragm 12. Small Plunger

110.0 (4.33)

26.0 (1.02)

45.0 (1.77)
156.0 (6.14)
216.0 (8.50)

Ø11 (0.43), Mounting Holes 4 NOS. 132 PCD (5.2″) 60/120/60 Deg. apart
145 A/F (5.71)

1/4″ BSP(F)
Low Pressure Port

1/4″ BSP(F)
High Pressure Port

75

Ø150.0 (Ø5.90)

APPROX. DIMENSIONS IN

mm inches

57 Bulletin No. KA231020

FC/FE LOW P HIGH PROOF PRESSURE DIFFERENCE SWITCHES
RANGE SELECTION TABLE

Range Code M03

Range mbar (“wc)
5 to 25 (2.007 to 10.046)

Differential* mbar (“wc)
Approximate Maximum for “A1”
microswitch
5.0 (2.009)

Maximum Working Pressure bar (psi)
100.0 (1450.38)

M05

10 to 50 (4.018 to 20.093)

5.0 (2.009)

100.0 (1450.38)

M10

10 to 100 (4.018 to 40.186)

10.0 (4.018)

100.0 (1450.38)

M15

10 to 150 (4.018 to 60.280)

10.0 (4.018)

100.0 (1450.38)

M25

20 to 250 (8.037 to 100.466)

15.0 (6.028)

100.0 (1450.38)

M35

50 to 350 (20.093 to 140.653)

35.0 (14.065)

100.0 (1450.38)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

75Bulletin No. KA231020

76

HOW TO ORDER FLAMEPROOF LOW P HIGH PROOF RANGE PRESSURE DIFFERENCE SWITCHES

LOW P HIGH PROOF PRESSURE DIFFERENCE FC/FE SWITCHES

77

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.

Approx. switch weight in Kgs

Enclosure FC

FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 7.870 7.370

Grey CI SS

10.270 9.770 10.420 9.870

*Not available in FE models

D1 =

M03 =

pressure

(5 – 25)

difference switch, fixed differential without scale

M05 = (10 – 50)

D2 = pressure

M10 = (10 – 100)

difference switch, M15 =

fixed differential (10 – 150)

with scale in mbar

M25 = (20 – 250)

D3 = pressure difference switch,

M35 = (50 – 350)

fixed differential

with scale in “wc

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General purpose microswitch rated at 15 A; 250 VAC
*A6 = elements with adjustable deadband

S1 =

0 =

SS316 / ¼” BSP(F) Neoprene

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

More options available, please contact sales office

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

For additional wetted parts please contact Sales Office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having 20 mbar to 250 mbar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

D1

M25

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

57 Bulletin No. KA231020

FC/FE ULTRA LOW RANGE PRESSURE DIFFERENCE SWITCHES FC

PRESSURE CAPSULE DETAILS

14 13 12 8 7
6
5 4 3
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

145.0

(5.71)

126.0

(4.96)

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

No. Description

1. High pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange (S.S.)*

4. Support plate (S.S.)

5. Diaphragm (Neoprene)

10

6. Gasket (Nitrile) 7. Top plate (S.S.)

8. Top flange ( S.S.)*

9. Transfer pin (S.S.)

11 9 2 1

10. ‘O’ ring (Nitrile) 11. Sealing diaphragm (Nitrile) 12. Top flange screw (S.S.) 13. Sealing ‘O’ ring (Nitrile) 14. Low pressure port (S.S.)*

*Pressure ports are brazed with flange

110.0 (4.33) 26.0
(1.02)

247 (9.72)

Ø7, MOUNTING HOLES 2 NOS

182 (7.16)

1/4″ BSP (F) LOW PRESSURE PORT

20.0 20.0
77.5 (0.78) (0.78) (3.05)

Bulletin No. KA231020

1/4″ BSP (F) HIGH PRESSURE PORT

78

3/4″ BSP
Ø155 (6.10)

160 (6.29)

MOUNTING NUT

APPROX. DIMENSIONS IN

mm inches

57

FC/FE ULTRA LOW RANGE PRESSURE DIFFERENCE SWITCHES FE

PRESSURE CAPSULE DETAILS

14 13 12 8 7
6
5 4 3

Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING
145.0 (5.71)

126.0 (4.96)

No. Description

1. High pressure port (S.S.)*

2. Support spring (S.S.)

3. Bottom flange (S.S.)*

4. Support plate (S.S.)

10

5. Diaphragm (Neoprene)

6. Gasket (Nitrile)

7. Top plate (S.S.)

8. Top flange ( S.S.)*

11

9. Transfer pin (S.S.)

9

10. ‘O’ ring (Nitrile)

2

11. Sealing diaphragm (Nitrile)

1

12. Top flange screw (S.S.)

13. Sealing ‘O’ ring (Nitrile)

14. Low pressure port (S.S.)*

*Pressure ports are brazed with flange

CABLE ENTRY 1/2″ NPT(F) (Option avail.)

110.0 (4.33)

(1.02) 26.0

192 (7.55)

Ø7, MOUNTING HOLES 2 NOS

132 (5.19)

1/4″ BSP (F) LOW PRESSURE PORT

20.0 20.0 (0.78) (0.78)
77.5 (3.05)

1/4″ BSP (F) HIGH PRESSURE PORT
79

MOUNTING

3/4″ BSP

NUT

Ø155

160

(6.10)

(6.29) APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE ULTRA LOW RANGE PRESSURE DIFFERENCE SWITCHES

RANGE SELECTION TABLE

Range Code

Range mbar (“Wc)

U15

0.4 to 1.5 (0.16 to 0.60)

Differential* mbar (“Wc)
Approximate Maximum for “A1”
microswitch
0.50 (0.20)

Maximum Working Pressure
bar (psi) 0.5
(7.25)

U25

0.5 to 2.5 (0.20 to 1.00)

0.80 (0.32)

0.5 (7.25)

U40

1.0 to 4.0 (0.40 to 1.60)

1.20 (0.48)

0.5 (7.25)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

80

75

HOW TO ORDER FLAMEPROOF ULTRA LOW RANGE PRESSURE DIFFERENCE SWITCHES

ULTRA LOW RANGE PRESSURE DIFFERENCE FC/FE SWITCHES

81

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 3.910 3.410

Grey CI SS

6.320 5.820 6.410 5.910

*Not available in FE models

D1 = pressure difference switch, fixed differential without scale

U15 = (0.4 – 1.5) U25 = (0.5 – 2.5) U40 = (1.0 – 4.0)

D2 = pressure difference switch, fixed differential with scale in mbar

D3 = pressure difference switch, fixed differential with scale in “Wc

A1 = General

S1 =

purpose microswitch SS316 /

rated at 15 A; 250 ¼” BSP(F)

VAC *A6 = elements

S2 = SS316 /

with adjustable

¼” NPT(F)

deadband

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

0 = Neoprene 1 = PTFE

For adjustable differential please select microswitches A6 or C6 in group 6

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

More options available, please contact sales office

eg. Flameproof switch for gas group, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, fixed differential without scale, having 0.16 to 0.60 “Wc pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

FC

1

Please specify full model number to avoid ambiguity.

Group 4 D1

Group 5 U15

Group 6 A1

Group 7 S1

Group 8 0

Bulletin No. KA231020

FC/FE VACUUM SWITCHES FC
PRESSURE CAPSULE DETAILS

6 5 4 3 2 1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.71) 126.0 (4.96)

No. Description 1. Disc 2. Diaphragm 3. Plunger (SS316) 4. Junction Plate 5. Sealing O-Ring (PTFE) 6. Sealing diaphragms (PTFE)

Cable Entry 1/2″ NTP(F) (Options Avail.)

110.0 (4.33)
26.0 (1.02)

227.0 (8.94) 167.0 (6.57)

34.5 (1.36)
Vacuum Port 1/4″ BSF(F)
75Bulletin No. KA231020

Ø7 (Ø 0.27), Mounting Holes, 2nos
Ø5 (Ø0.20) Hole (to be always open to atmosphere)
82

APPROX. DIMENSIONS IN

mm inches

PRESSURE CAPSULE DETAILS

FC/FE VACUUM SWITCHES FE

6 5 4 3 2
1
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING
145.0 (5.71)

126.0 (4.96)

No. Description 1. Disc 2. Diaphragm 3. Plunger (SS316) 4. Junction Plate 5. Sealing O-Ring (PTFE) 6. Sealing diaphragms (PTFE)

Cable Entry
1/2″ NTP(F) (Options Avail.)

110.0 (4.33)

26.0 (1.02)

186.0 (7.32)

126.0 (4.96)

Ø7, Mounting Holes 2 Nos.

34.5 (1.36)

1/4″ BSP(F) Vacuum Port

50.8 (2.0)

Ø5 (Ø0.20) Hole (To be always open to atmosphere)
83

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE VACUUM SWITCHES
RANGE SELECTION TABLE

Range Code V00

Range mm Hg (” Hg) 760 to 100 (29.92 to 3.94)

Differential* mm Hg (“Hg)
Approximate Maximum for “A1”
microswitch
20.0 (0.78)

Maximum Working Pressure
bar (psi) 12.0
(174.05)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

75Bulletin No. KA231020

84

HOW TO ORDER FLAMEPROOF VACUUM RANGE SWITCHES

VACUUM FC/FE SWITCHES

85

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mmHg)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.030 1.530

Grey CI SS

4.430 3.950 4.560 4.050

*Not available in FE models

V1 = vacuum switch, fixed differential without scale

V00 = ( 760 – 100)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General purpose microswitch rated at 15 A; 250 VAC
*A6 = elements with adjustable deadband

S1 =

0 =

SS316 / ¼” BSP(F) Neoprene

S2 =

1 =

SS316 / ¼” NPT(F) PTFE

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

More options available, please contact sales office

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

For additional wetted parts please contact Sales Office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT vacuum switch, having 760 mm Hg to 100 mm Hg vacuum range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

V1

V00

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

57 Bulletin No. KA231020

FC/FE HIGH RANGE COMPOUND SWITCHES FC
PRESSURE CAPSULE DETAILS

4 3 2
1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 126.0 (5.71) (4.96)

No. Description 1. Pressure Housing 2. PTFE O-Ring 3. Diaphragm

5

4. Conical Plunger

5. Bottom Spring

6

6. Support Plate

110.0 (4.33)

26.0 (1.02)

Ø7 (Ø 0.27), Mounting Holes, 2nos

215.0 (8.46) 155.0 (6.10)

75Bulletin No. KA231020

PRESSURE PORT 1/4″ BSPF Std. (Options Avail.)
86

A/F19 (A/F 0.74)

APPROX. DIMENSIONS IN

mm inches

FC/FE HIGH RANGE COMPOUND SWITCHES FE
PRESSURE CAPSULE DETAILS

4 3 2
1

Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
126.0 (4.96)

145.0 (5.7)

No. Description 1. Pressure Housing

5

2. PTFE O-Ring 3. Diaphragm

6

4. Conical Plunger

5. Bottom Spring

6. Support Plate

Cable Entry 1/2″ NPT(F) (Options Avail.)

110.0 (4.33)

26.0 (1.02)

105.0 (4.13)
165.0 (6.49)

Ø7, Mounting Holes 2 Nos.
A/F19 (0.74)

1/4″ BSP(F) Pressure Port

(A/F 0.74)

87

50.8 (2.0)

APPROX. DIMENSIONS IN

mm inches

57 Bulletin No. KA231020

FC/FE HIGH RANGE COMPOUND SWITCHES
RANGE SELECTION TABLE

Range Code C01

Range bar (psi) -1 to 1.0 (-14.50 to 14.50)

Differential* bar (psi)
Approximate Maximum for “A1”
microswitch
0.15 (2.17)

Maximum Working Pressure
bar (psi) 12.0
(174.05)

C02

-1 to 1.5 (-14.50 to 21.75)

0.2 (2.90)

12.0 (174.05)

C03

-1 to 2.6 (-14.50 to 37.71)

0.3 (4.35)

12.0 (174.05)

C04

-1 to 3.6 (-14.50 to 52.21)

0.4 (5.80)

12.0 (174.05)

C07

-1 to 7 (-14.50 to 101.53)

0.8 (11.603)

12.0 (174.05)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

75Bulletin No. KA231020

88

HOW TO ORDER FLAMEPROOF COMPOUND RANGE SWITCHES

HIGH RANGE COMPOUND FC/FE SWITCHES

89

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.110 1.510

Grey CI SS

4.520 3.920 4.610 4.110

*Not available in FE models

C1 = compound switch, fixed differential without scale

C01 = (-1 to 1.0) C03 = (-1 to 2.6) C04 = (-1 to 3.6) C07 = (-1 to 7.0)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General purpose microswitch
rated at 15 A; 250
VAC

S1 =

0 = Neoprene

SS316 / ¼” BSP(F) 1 = PTFE S2 = SS316 / ¼” NPT(F) 2 = SS 316L

*A6 = elements with adjustable deadband

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

More options available, please contact sales office

eg. A flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having -1 bar to +1 bar pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & Neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

FC

1

C1

C01

A1

S1

0

Please specify full model number to avoid ambiguity. If only the first two groups are specified while ordering, uncalibrated switches with standard wetted parts and enclosures will be supplied.

57 Bulletin No. KA231020

FC/FE LOW RANGE COMPOUND SWITCHES FC
PRESSURE CAPSULE DETAILS

11 10
8 7
6
5 4 3
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
145.0 (5.71) 126.0 (4.96)

No. Description

9

1. Pressure port (S.S.)* 2. Support spring (S.S.)

3. Bottom flange (S.S.)

4. Support plate (Aluminium)

5. Diaphragm (Neoprene)

6. Gasket (Nitrile)

7. Top plate (Aluminium)

8. Top flange (S.S.)

2

9. Plunger (Aluminium) 10. Top flange screw (S.S.)

11. Sealing ‘O’ ring (Nitrile)

1

*Pressure port is welded with flange

Cable Entry 1/2″ NPT(F)(Option avail.)

110.0 (4.33)

26.0 (1.02)

Ø7 (Ø 0.27), Mounting Holes 2 Nos

228.0 (8.98) 168.0 (6.61)

Bulletin No. KA231020

Ø130.0 (Ø5.1)

Pressure Port 1/4″BSP(F)
90

Ø130.0

(Ø5.1)

APPROX. DIMENSIONS IN

mm inches

57

FC/FE LOW RANGE COMPOUND SWITCHES FE
PRESSURE CAPSULE DETAILS

11 10 8 7
6
5 4 3

Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING
126.0 (4.96)

145.0 (5.71)

9 No. Description 1. Pressure port (S.S.)* 2. Support spring (S.S.) 3. Bottom flange (S.S.) 4. Support plate (Aluminium) 5. Diaphragm (Neoprene) 6. Gasket (Nitrile)

7. Top plate (Aluminium)

2

8. Top flange (S.S.)

9. Plunger (Aluminium)

10. Top flange screw (S.S.)

1

11. Sealing ‘O’ ring (Nitrile)

*Pressure port is welded with flange

Cable Entry
1/2″ NPT(F) (Option avail.)

110.0 (4.33)

26.0 (1.02)

178.0 (7.08)

Ø7, Mounting Holes 2 Nos
Ø130.0 (Ø5.1)

118.0 (4.64)

Mounting Nut Pressure Port 1/4″BSP(F)
91

Ø130.0

(Ø5.1)

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC/FE LOW RANGE COMPOUND SWITCHES

RANGE SELECTION TABLE

Range Code

Range mbar (“Wc)

CL2

-15 to 15 (-6.030 to 6.030)

Differential* mm wc (“Wc)
Approximate Maximum for “A1”
microswitch
40.0 (1.574)

Maximum Working Pressure
bar (psi) 2.0
(29.00)

CL3

-25 to 25 (-10.047 to 10.047)

60.0 (2.362)

2.0 (29.00)

CL5

-50 to 50 (-20.093 to 20.093 )

100.0 (3.937)

2.0 (29.00)

CLX

-100 to 100 (-40.186 to 40.186)

150.0 (5.90)

2.0 (29.00)

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
2. When using 2SPDT switching arrangement, both microswitches may not actuate and/or deactuate at the same point. A small stage gap, normally upto +/- 5% FSR (depending on range code) may be observed. The On-Off differential (hysterisis) typically tends to be atleast double of those published for 1SPDT pressure switches.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

92

75

HOW TO ORDER LOW RANGE COMPOUND SWITCHES

LOW RANGE COMPOUND FC/FE SWITCHES

93

Group 1
Non standard allocation

Group 2 Model

Group 3 Cable Entry Size

Group 4 Switch Type

Group 5
Range Code (values in mbar)

Group 6
Microswitch Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

IP66

model code in Flameproof

case of any pressure switch,

non standard ATEx, IECEx &

options /

PESO approved

accessories that are provided with the switches. Will be given by

FE = IP66 Flameproof pressure switch, PESO approved

manufacturer,

only after

agreement of

supply details

with customer.

1 = Al. head ½” NPT threads
2 = Al. head ¾” NPT threads
3 = Al. head M20 x 1.5 threads
4 = Grey CI head ½” NPT threads
5 = Grey CI head ¾” NPT threads
*6 = Grey CI head M20 x 1.5 threads
7 = SS head ½” NPT threads

The prefix is subject to change as per specific requirement.
Approx. switch weight in Kgs
Enclosure FC FE

8 = SS head ¾” NPT threads
9 = SS head M20 x 1.5 threads

Aluminium 2.450 1.950

Grey CI SS

4.850 4.350 4.950 4.450

*Not available in FE models

C1 = Compound switch, fixed differential without scale

CL2 = (1.5 – 15) CL3 = (-25 – 25)

CL5 = (-50 – 50)

CLX = (-100 – 100)

For adjustable differential please select microswitches A6 or C6 in group 6

A1 = General

S1 =

purpose microswitch SS316 /

rated at 15 A; 250 ¼” BSP(F)

VAC *A6 = elements

S2 = SS316 /

with adjustable

¼” NPT(F)

deadband

*A7 = 2SPDT switching elements

A8 = General purpose microswitch rated at 5
A, 250 VAC; 5 A, 28
VDC

*B7 = 2SPDT Switching Elements

C6 = 1SPDT Adjustable Differential

0 = Neoprene 1 = PTFE

Please refer to page nos. 120 & 121 for options and specifications of microswitches * Please contact sales office for additional information

More options available, please contact sales office

eg. Flameproof switch for gas group IIC, with ½” NPT cable entry in aluminium housing as 1SPDT pressure switch, having -150 to 150 mm Wc pressure range, with 15 Amp. microswitch, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2

Group 3

FC

1

Please specify full model number to avoid ambiguity.

Group 4 C1

Group 5 CL2

Group 6 A1

Group 7 S1

Group 8 0

Bulletin No. KA231020

FC
Low DP High Proof

IECEx CoC
APPROVED

Applications Y Explosive areas
Y Underground mines

P 1.5 mbar – 15 mbar Pmax = 100 bar
II2 GD Ex d IIC Gb Ex tb IIIC Db

PRESSURE SWITCHES P SWITCHES

0.2 mbar to 1000 bar

FC HIGH RANGE AIR RELAY SWITCHES FC
PRESSURE CAPSULE DETAILS

5 4 3 2

1
Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

OD 4mm PU Tube Air In

126.0 (4.96)

145.0 (5.71)

No. Description 1. Pressure Port 2. PTFE O-Ring 3. Back Up Ring 4. Diaphragm 5. Conical Plunger

110.0 (4.33) 26.0
(1.02)

OD 4mm PU Tube NO – Air Out
OD 4mm PU Tube NC – Air Out

Ø7, Mounting Holes 2 Nos

208 (8.18)

148 (5.82)

Pressure Port 1/4″ BSP(F) Std. Options Available
95

19A/F (0.75)

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC HIGH RANGE AIR RELAY SWITCHES
RANGE SELECTION TABLE

Range Code
LP LP5 H01 H02 H03 H04 H07 H10 H15 H30

Range bar (psi)
0.067 to 0.213 (0.97 to 3.09)
0.1 to 0.5 (1.45 to 7.25)
0.1 to 1.0 (1.45 to 14.50)
0.1 to 1.5 (1.45 to 21.76)
0.2 to 2.6 (2.90 to 37.71)
0.2 to 3.6 (2.90 to 52.21)
0.5 to 7.0 (7.25 to 101.53)
0.5 to 10.0 (7.25 to 145.037)
1.0 to 15.0 (14.50 to 217.56)
5.0 to 25.0 (72.52 to 362.60)

Differential* bar (psi) Approximate Maximum
for P1 / P2 (Refer Group 6 of How to order table)
0.02 (0.29)
0.08 (1.16)
0.10 (1.45)
0.3 (4.35)
0.4 (5.80)
0.5 (7.25)
0.6 (8.70)
1.0 (14.50)
1.5 (21.75)
2.0 (29.00)

Maximum Working Pressure bar (psi)
5.0 (72.52)
5.0 (72.52)
12.0 (174.05)
12.0 (174.05)
12.0 (174.05)
12.0 (174.05)
12.0 (174.05)
25.0 (362.6)
25.0 (362.6)
35.0 (507.63)

Pneumatic valve specifications
NO = Normally Open or NC = Normally Closed

2(A) 1(P) 3(R)

CAUTION : Supply pressure of air/inert gas = min. 2 and max. 7 bar

Note:
1. The minimum differential increases with the setpoint. The differential values mentioned in the above table are approximate maximum for FSR. The differential value will vary according to the pressure range selected and microswitch type. For actual values of differential please contact sales office.
If actuation and/or deactuation at same point is critical part of operation, then it can be achieved by using a separate DPDT relay. This relay will need a separate power supply for it’s coil.

Bulletin No. KA231020

96

57

57

HOW TO ORDER HIGH RANGE AIR RELAY SWITCHES

HIGH RANGE AIR RELAY FC SWITCHES

97

Group 1
Non standard allocation

Group 2 Model

Group 3
Air Inlet/Outlet Ports

Group 4 Switch Type

Group 5
Range Code (values in bar)

Group 6 Valve Type

Group 7
Pressure Port Material / Size

Group 8 Diaphragm

A prefix “N” is FC =

used in the

Air Relay switch

model code in

case of any

non standard Note:

options /

Flameproof

accessories certification not

that are

applicable for

provided with Air Relay Switch

the switches.

Will be given by

manufacturer,

only after

agreement of

supply details

with customer.

A1 = Al. head PU tube 4mm OD *A4 = Grey CI PU tube 4mm OD A7 = SS head PU tube 4mm OD

The prefix is subject to change as per specific requirement.

Approx. switch weight in Kgs

Enclosure

FC

Aluminium

2.110

Grey CI

4.520

SS

4.620

*Not available in FE models

P1 = pressure switch, fixed differential without scale

LP = (0.067 – 0.213) LP5 = (0.1 – 0.5) H01 = (0.1 – 1.0) H02 (0.1 – 1.5) H03 = (0.2 – 2.6) H04 = (0.2 – 3.6) H07 = (0.5 – 7.0) H10 = (0.5 – 10.0) H15 = (1.0 – 15.0) H30 = (5.0 – 25.0)

P1= NC valve P2 = NO valve

S1 =

1 =

SS316 / ¼” BSP(F) PTFE

S2 =

2 =

SS316 / ¼” NPT(F) SS 316L

3 = Hastelloy C

4 = Monel

5 = Titanium

6 = Tantalum

7 = Inconel

More options available, please contact sales office

eg. Flameproof air relay switch in aluminium housing with PU tube 4mm OD, fixed differential without scale, having 0.5 bar to 10 bar pressure range, with NC valve, SS316 pressure housing with ¼” BSP port size & neoprene diaphragm shall be specified by

Group 1

Group 2 FC

Group 3 A1

Group 4 P1

Group 5 H01

Group 6 P1

Group 7 S1

Group 8 1

Please specify full model number to avoid ambiguity.

Bulletin No. KA231020

FC
Flameproof Pressure Switches

IECEx CoC
APPROVED

(HDAyifdsfjetuWerseriitntsahtibisal)el

Applications Y Oil and Gas sector
Y Gas skids and cooling systems

Ideal for Gas Compressors

II2 GD Ex d IIC Gb Ex tb IIIC Db

PRESSURE SWITCHES P SWITCHES

0.2 mbar to 1000 bar

FC HYDRAULIC DIAPHRAGM AIR RELAY SWITCHES FC
PRESSURE CAPSULE DETAILS

Note : wetted parts are mentioned in italics.

INSTALLATION DRAWING

OD 4mm PU Tube Air In

145.0 (5.71)

126.0 (4.96)

No. Description 1. Transfer PIN (SS) 2. Cushining Pad 3. O-ring (PTFE®) 4. Diaphragm (PTFE®) 5. Pressure Housing (SS316)
1 2
3 4
5

OD 4mm PU Tube Air Out

110 (4.33)

26.0 (1.02)

220 (8.66)

Ø7, Mounting Holes 2 Nos

160 (6.29)

Pressure Port 1/4″ BSP(F) (Options Available)

50.8 (2.0)

99

APPROX. DIMENSIONS IN

mm inches

Bulletin No. KA231020

FC HYDRAULIC DIAPHRAGM AIR RELAY SWITCHES

RANGE SELECTION TABLE

Range Code

Range bar (psi)

H1T

0.5 – 10 (7.25 – 145.04)

Differential* bar (psi)
Approximate Maximum for P1 / P2
(Refer Group 6 of How to order table)
1 (14.50)

Maximum Working Pressure
bar (psi) 150
(2175.51)

H2T

2 – 20 (29.00 – 290.07)

2 (29.00)

200 (2900.76)

H4T

5 – 40 (72.52 – 580.15)

5 (72.52)

200 (2900.76)

H1H

10 – 100 (146.04 – 1450.38)

12 (174.05)

200 (2900.76)

H2H

7 – 200 (101.52 – 2900.76)

24 (348.09)

400 (5801.52)

H4H

40 – 400 (580.15 – 5801.52)

50 (725)

500 (7251.88)

H7H

70 – 700 (1015.26 – 10152.64)

60 (870)

800 (11603)

H1K

100 – 1000 (1450.37 – 14503.77)

70 (1015.26)

1100 (15954.15)

Pneumatic valve specifications
NO = Normally Open or NC = Normally Closed

2(A) 1(P) 3(R)

CAUTION : Supply pressure of air/inert gas = min. 2 and max. 7 bar

Note:
1. The minimum differential increases with the setpoint. The di

References

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