Orion INSTRUMENTS KA231020 FC and FE Low Range Pressure Difference Switches Owner’s Manual

LOW RANGE PRESSURE
DIFFERENCE SWITCHES
FC/FE

KA231020 FC and FE Low Range Pressure Difference Switches

PRESSURE CAPSULE DETAILS

Note : wetted parts are mentioned in italics.

• Pressure ports are welded with flange

INSTALLATION DRAWING

RANGE SELECTION TABLE

Range Code| Range mbar (“wc)| *Differential mbar (” wc)| Maximum Working Pressure bar (psi)**
---|---|---|---
Approximate Maximum for “A1” microswitch
L02| 1.5 to 15
(0.60 to 6.030)| 3.0
(1.205)| 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.

HOW TO ORDER FLAMEPROOF LOW RANGE PRESSURE DIFFERENCE SWITCHES

Non standard
allocation| Model| Cable Entry Size| Switch Type| Range Code
(values in mbar)| Microswitch
Type| Pressure Port
Material / Size| Diaphragm
A prefix “N” is
used in the
model code in
case of any
non standard
options /
accessories
that are
provided with
the switches.
Will be given by
manufacturer,
only after
agreement of
supply details
with customer.
Bulletin No. KA231020
The prefix is subject to
change as per specific
requirement.| FC =
IP66
Flameproof
pressure switch,
ATEx, IECEx &
PESO approved
FE =
IP66 Flameproof
pressure switch,
PESO approved| 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
8 = SS head
¾” NPT threads
9 = SS head
M20 x 1.5 threads
Not available in
FE models| D1 =
pressure
difference switch,
fixed differential
without scale
D2 =
pressure
difference switch,
fixed differential
with scale in
mbar
D3 =
pressure
difference switch,
fixed differential
with scale in “wc For adjustable differential
please select
microswitches A6 or C6
in group 6| L02 =
(1.5 – 15)
L03 =
(5 – 25)
L05 =
(10 – 50)
L10 =
(10 – 100)
L15 =
(10 – 150)
L25 =
(20 – 250)
L35 =
(50 – 350)| A1 = General
purpose microswitch
rated at 15 A; 250
VAC
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
Differentia
Please refer to page nos.
120 & 121 for options and
specifications of
microswitches

• Please contact sales office for additional
  information| S1 =
  SS316 / ¼” BSP(F)
  S2 =
  SS316 / ¼” NPT(F)| 0 =
  Neoprene
  1 =
  PTFE
  Approx. switch weight in Kgs| Enclosure| FC| FE
  ---|---|---
  Aluminium| 2.250| 1.750
  Grey CI| 4.650| 4.150
  SS| 4.730| 4.250
  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

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

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