Emerson Fisher 627 Series Pressure Reducing Regulators Instruction Manual

: June 16, 2024
: Emerson

Table of Contents

Emerson Fisher 627 Series Pressure Reducing Regulators Instruction Manual
Introduction
Description
Specifications
Product Description
Installation
Startup and Adjustment
Shutdown
Maintenance
Parts List
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Emerson Fisher 627 Series Pressure Reducing Regulators Instruction Manual

Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-
product

WARNING
Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion and/or fire causing property damage and personal injury or death. Fisher™ regulators must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations, and Emerson Process Management Regulator Technologies, Inc. instructions. If the regulator vents gas or a leak develops in the system, service to the unit may be required. Failure to correct trouble could result in a hazardous condition. Call a gas service person to service the unit. Only a qualified person must install or service the regulator.

Introduction

Scope of the Manual
This manual provides instructions for the installation, adjustment, maintenance and parts ordering information for the 627 Series regulators. These regulators are usually shipped separate for line installation, although sometimes they are shipped installed on other equipment. Refer to the Instruction Manual of the other equipment for installation and operating instructions.

Description

The 627 Series direct-operated pressure reducing regulators (Figure 1) are for high and low pressure systems. These regulators can be used with natural gas, air or a variety of other gases. Performance characteristics vary according to construction.

WARNING
Personal injury, property damage, equipment damage or leakage due to escaping gas or bursting of pressure-containing parts may result if this regulator is over pressured or is installed where service conditions could exceed the limits given in the Specifications section, Tables 1, 2, 3 and 4 or where conditions exceed any ratings of the adjacent piping or piping connections. To avoid such injury or damage, provide pressure-relieving or pressure-limiting devices (as required by the appropriate code, regulation or standard) to prevent service conditions from exceeding those limits.

The Types 627R, 627LR or 627MR regulator with internal relief will provide downstream overpressure protection within the limits given in the Specifications section, Tables 1, 2, 3 and 4. If these limits are exceeded, additional downstream overpressure protection must be provided by the user. Additionally, physical damage to the regulator could cause personal injury or property damage due to escaping gas. To avoid such injury or damage, install the regulator in a safe location.

Specifications

The Specifications section gives some general specifications for the 627 Series regulators. The nameplates give detailed information for a particular regulator as it comes from the factory.

Available Constructions

Type 627: Direct-operated pressure reducing regulator equipped with a pitot tube for greater regulated capacities (Figure 7).
Type 627R: Type 627 with internal relief and with an open throat (Figure 8).
Type 627LR: Type 627R with light rate relief spring (Figure 9).
Type 627M: Type 627 with a stem seal between the body outlet pressure and diaphragm case.
Pressure is measured under the diaphragm through the 1/4 NPT downstream control line connection (Figure 10).
Type 627MR: Type 627M with internal relief (Figure 11).
Type 627H: Type 627 with a diaphragm limiter to deliver a higher outlet pressure (Figure 12).
Type 627HM: Type 627H with a stem seal between the body outlet pressure and diaphragm case.
Pressure is measured under the diaphragm through the 1/4 NPT downstream control line connection (Figure 13).
Type 627OSX: Type 627 with Type OS2 slam shut device for overpressure protection. Available with Over and Under Pressure Trip points. (Figure 14)

Body Sizes and End Connection Styles

BODY SIZE	END CONNECTION STYLE	CONSTRUCTION AVAILABLE
NPS	DN
3/4	– – – –	NPT

All

| ****

| NPT, CL150 RF, CL300 RF,

CL600 RF and Long Body

1-1/4| 32| NPT
2| 50| NPT, CL150 RF, CL300 RF,

CL600 RF and Long Body

Maximum Inlet Pressure(1) (Body Rating)
Flanged Stainless Steel: 1440 psig / 99.3 bar
NPT Stainless Steel: 2000 psig / 138 bar
Flanged Steel: 1500 psig / 103 bar
NPT Steel: 2000 psig / 138 bar
NPT Steel (Type 627OSX):
1500 psig / 138 bar
Ductile Iron: 1000 psig / 69.0 bar
Maximum Valve Disk Inlet Pressure Rating(1)
Nylon (PA) Disk: 2000 psig / 138 bar
Nitrile (NBR) Disk: 1000 psig / 69.0 bar
Fluorocarbon (FKM) Disk: 300 psig / 20.7 bar
Maximum Operating Inlet Pressure, Pressure Differential and Outlet Pressure Ranges(1)

See Table 1 for pressures by orifice size and spring range

The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
Types 627, 627H, 627R,627LR and 627OSX are limited by maximum diaphragm casing pressure.
Stainless steel body is rated to -40°F / -40°C. Steel and Ductile Iron bodies are rated to -20°F / -29°C.
Maximum Spring and Diaphragm Casing Pressure(1)

See Table 2

Maximum Body Outlet Pressure(1)(2)
Types 627M, 627MR and 627HM only
NPT Steel: 2000 psig / 138 bar
Flanged Steel: 1500 psig / 103 bar
Ductile Iron: 1000 psig / 69.0 bar
Type 627OSX
NPT Steel: 1500 psig / 103 bar Orifice Sizes

See Table 1

Options

Up to 25% Hydrogen Blend (By Volume) Construction
100% Hydrogen Construction

Internal Relief Performance

Type 627R: See Table 3
Type 627LR: See Table 4
Type 627MR: Limited by field-installed control

line piping
Elastomer Temperature Capabilities(1)(3

MATERIAL	DISK/ DIAPHRAGM	TEMPERATURE
°F	°C
Nitrile (NBR)	Disk	-40 to 180

Diaphragm

| ****

-20 to 180

| ****

-29 to 82

Flow Coefficients

See Table 5
IEC Sizing Coefficients
See Table 6

Pressure Registration

Types 627, 627H, 627R, 627LR, 627OSX or 627HOSX: Internal
Types 627M, 627HM, 627MR, 627MOSX or 627HMOSX: External through 1/4 NPT control line connection in the diaphragm casing

Specifications (continued)

De-Icer System
See Figure 3 and Type 627M Regulator De-Icer
System Application section
Relief Indicator
For Types 627R, 627LR and 627MR (see Figures 8, 9 and 11)
Spring Case Vent Connection
3/4 NPT with removable screened vent assembly
Approximate Weights 627 Series
Ductile iron, Steel or Stainless steel Casings: 10 lbs / 5 kg
Aluminum Casing: 6.3 lbs / 3 kg
Type 627OSX
NPS 1 / DN 25: 40 lbs / 18 kg
NPS 2 / DN 50: 42 lbs / 19 kg

Principle of Operation
Refer to Figure 2. When downstream demand decreases, the pressure under the diaphragm increases. This pressure overcomes the regulator setting (which is set by a spring). Through the action of the pusher post assembly, lever and valve stem the valve disk moves closer to the orifice and reduces gas flow. If demand downstream increases, pressure under the diaphragm decreases. Spring force pushes the pusher post assembly downward and the valve disk moves away from the orifice.

Product Description

Types 627 and 627H Direct-Operated Pressure Reducing Regulators—The Types 627 and 627H regulators provide economical pressure reducing control for a variety of residential, commercial and industrial applications. The regulator pitot tube located in a high velocity stream provides dynamic boost that compensates for outlet pressure drop.

Type 627 Long Body—The Type 627 Long Body regulator can be used as a drop-in replacement for existing Type 630 installations without the need to modify piping. Internal Relief for Type 627R, 627LR or 627MR Regulator—The Type 627R internal relief performance values were obtained by removing the disk assembly from the regulator. For the Type 627R, 627LR or 627MR regulator, the internal relief across the diaphragm provides overpressure protection in many applications. As outlet pressures build up above the start-to-discharge point, the diaphragm moves off the relief valve seat allowing the excess pressure to bleed out through the screened vent.

For extra protection, should failure conditions exist which would prevent normal operation of the regulator (for example, disk broken off or disk erosion), the pusher post contacts the lever retainer causing the relief valve assembly to open. Since the diaphragm continues to rise as downstream pressure builds, it opens the relief valve; thereby, opening the valve. This internal relief may be adequate for the application.

Downstream Control Line for Type 627M, 627HM, 627MR, 627MOSX or 627HMOSX Regulator—A Type 627M, 627HM, 627MR, 627MOSX or 627HMOSX regulator has a blocking throat stem seal with O-rings and a 1/4 NPT control line connection in the diaphragm case. A regulator with a downstream control line is used for monitoring applications or other applications where other equipment is installed between the regulator and the pressure control point. The stem seal separates the body outlet pressure from the diaphragm case.

Type 627OSX— The Type 627OSX regulator with integral slam-shut device can provide either overpressure (OPSO) or overpressure (OPSO) and under pressure (UPSO) protection by completely shutting off the flow of gas to the downstream system.

Installation

Regulator operation within ratings does not preclude the possibility of damage from debris in the lines or from external sources. A regulator should be inspected for damage periodically and after any overpressure condition. Key numbers referenced in this section are shown in Figures 7 through 13. Ensure that the operating temperature capabilities listed in Specifications section are not exceeded.

Note
If the regulator is shipped mounted on another unit, install that unit according to the appropriate Instruction Manual. Perform steps 1 through 6 for all types of regulators:

Only personnel qualified through training and experience should install, operate or maintain this regulator.
For a regulator that is shipped separately, make sure that there is no damage to or foreign material in the regulator.
Ensure that all tubing and piping have been blown free of foreign debris.
The regulator may be installed in any position as long as the flow through the body is in the direction indicated by the arrow cast on the body. $Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $1$$

627 Series
Type 627OSX must be installed in a horizontal position and the mechanism box must be above or below the body. It is recommended to install vents upstream and downstream of the regulator between the shutoff valves. Pipe supports should be used for flanged Type 627OSX units due to weight. See Type OS2 Instruction Manual (D102778X012) for additional information. If continuous operation is required during inspection or maintenance, install a three-valve bypass around the regulator.

WARNING
A regulator may vent some gas to the atmosphere. In hazardous or flammable gas service, vented gas may accumulate and cause personal injury, death or property damage due to fire or explosion. Vent a regulator in hazardous gas service to a remote, safe location away from air intakes or any hazardous area. The vent line or stack opening must be protected against condensation or clogging.

Position the body (key 1) and/or diaphragm spring case (key 29) so it will not collect moisture or debris into the screened vent. If the regulator requires repositioning, refer to the Body Area Maintenance Procedures and/or the Diaphragm and Spring Case Area Maintenance Procedures in the Maintenance section to reposition the screened vent for the application. Perform steps 7 through 9 for Types 627M, 627HM, 627MR, 627MOSX and 627HMOSX regulators only:

A Type 627M, 627HM, 627MR, 627MOSX or 627HMOSX regulator requires a downstream control line. Install the control line before putting the regulator into operation. Ensure that the downstream control line piping is at least 3/8 in. / 9.5 mm or larger outside diameter tubing and connected to a straight section of outlet piping 10 diameters downstream of the regulator.
A hand valve should be installed in the control line. This hand valve can be used to throttle down and dampen outlet pulsations in control pressure which may cause instability or cycling of the regulator.

Remote Vent Line Installation
All 627 Series regulators have a vent assembly installed in the 3/4 NPT spring case vent opening. The vent assembly can be removed to install a remote vent line if necessary. Remote vent lines must have the largest practical diameter. It should be as short as possible with minimum number of bends or elbows. Protect the remote vent opening against entrance of rain, snow or any other foreign material that may plug the vent or vent line and prevent proper operation of the regulator. Periodically check the vent opening to be sure it is not plugged with foreign debris.

Table 1. Maximum Inlet Pressures and Outlet Pressure Ranges

TYPE

| OUTLET PRESSURE RANGE, SPRING PART NUMBER AND COLOR CODE| __

ORIFICE SIZE

| MAXIMUM INLET PRESSURE (1)
---|---|---|---
Nylon (PA) Disk (2)| Nitrile (NBR) Disk| Fluorocarbon (FKM) Disk
In.| mm| psig| bar| psig| bar| psig| bar
| 5(3) to 20 psig /

0.34 to 1.4 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

1000

750

| 138

69.0

51.7

| 1000

1000

750

| 69.0

69.0

51.7

| 300

300

| 20.7

20.7

| 10B3076X012

Yellow

| 1/4

3/8

1/2

| 6.4

9.5

| 500

300

250

| 34.5

20.7

17.2

| 500

300

250

| 34.5

20.7

17.2

| 300

300

250

| 20.7

20.7

17.2

| 15 to 40 psig /

1.0 to 2.8 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

1500

1000

| 138

103

69.0

| 1000

1000

| 69.0

69.0

| 300

300

| 20.7

20.7

627,

627M

| 10B3077X012

Green

| 1/4

3/8

1/2

| 6.4

9.5

| 750

500

300

| 51.7

34.5

20.7

| 750

500

300

| 51.7

34.5

20.7

| 300

300

| 20.7

20.7

and 627OSX(4)| 35 to 80 psig /

2.4 to 5.5 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

2000

1750

| 138

138

121

| 1000

1000

| 69.0

69.0

| 300

300

| 20.7

20.7

| 10B3078X012

Blue

| 1/4

3/8

1/2

| 6.4

9.5

| 1500

1000

750

| 103

69.0

51.7

| 1000

1000

750

| 69.0

69.0

51.7

| 300

300

| 20.7

20.7

| 70 to 150 psig /

4.8 to 10.3 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

2000

| 138

138

| 1000

1000

| 69.0

69.0

| 300

300

| 20.7

20.7

| 10B3079X012

Red

| 1/4

3/8

1/2

| 6.4

9.5

| 1750

1250

750

| 121

86.2

51.7

| 1000

1000

750

| 69.0

69.0

51.7

| 300

300

| 20.7

20.7

| 5(2) to 20 psig /

0.34 to 1.4 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

1000

750

| 138

69.0

51.7

| 1000

1000

750

| 69.0

69.0

51.7

| 300

300

| 20.7

20.7

| 10B3076X012

Yellow

| 1/4

3/8

1/2

| 6.4

9.5

| 500

300

200

| 34.5

20.7

13.8

| 500

300

200

| 34.5

20.7

13.8

| 300

300

200

| 20.7

20.7

13.8

| 15 to 40 psig /

1.0 to 2.8 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

1500

1000

| 138

103

69.0

| 1000

1000

| 69.0

69.0

| 300

300

| 20.7

20.7

627R

and 627MR

| 10B3077X012

Green

| 1/4

3/8

1/2

| 6.4

9.5

| 750

300

200

| 51.7

20.7

13.8

| 750

300

200

| 51.7

20.7

13.8

| 300

300

200

| 20.7

20.7

13.8

35 to 80 psig /

2.4 to 5.5 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

1750

1000

| 138

121

69.0

| 1000

1000

| 69.0

69.0

| 300

300

| 20.7

20.7

| 10B3078X012

Blue

| 1/4

3/8

1/2

| 6.4

9.5

| 750

300

200

| 51.7

20.7

13.8

| 750

300

200

| 51.7

20.7

13.8

| 300

300

200

| 20.7

20.7

13.8

| 70 to 150 psig /

4.8 to 10.3 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

1000

500

| 138

69.0

34.5

| 1000

1000

500

| 69.0

69.0

34.5

| 300

300

| 20.7

20.7

| 10B3079X012

Red

| 1/4

3/8

1/2

| 6.4

9.5

| 300

200

| 20.7

13.8

| 300

200

| 20.7

13.8

| 300

200

| 20.7

13.8

| 15 to 40 psig /| 3/32

1/8

3/16

1/4

| 2.4

3.2

4.8

6.4

| | 1000

1000

750

500

| 69.0

69.0

51.7

34.5

| 300

300

| 20.7

20.7

9.7 to 17.2 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

2000

1750

| 138

138

121

| 1000

1000

| 69.0

69.0

|
__

627H,

627HM

| 10B3078X012

Blue

| 1/4

3/8

1/2

| 6.4

9.5

| 1500

1000

750

| 103

69.0

51.7

| 1000

750

500

| 69.0

51.7

34.5

and 627HOSX(4)| 240 to 500 psig /

16.5 to 34.5 bar

| 3/32

1/8

3/16

| 2.4

3.2

4.8

| 2000

2000

1750

| 138

138

121

| 1000

1000

| 69.0

69.0

|
| 10B3079X012

Red

| 1/4

3/8

1/2

| 6.4

9.5

| 1500

1000

750

| 103

69.0

51.7

| 1000

1000

750

| 69.0

69.0

51.7

– Shaded areas indicate that Fluorocarbon (FKM) and Nylon (PA) disk material are not available.

1. For inlet pressure in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specifications section.

2. Maximum inlet pressure for Type 627OSX is limited to 1500 psi / 103 bar.

3. For pressure settings under 10 psig / 0.69 bar, inlet pressure should be limited to approximately 100 psig / 6.9 bar so the setpoint adjustment can be obtained.

4. The unbalance forces change from the wide-open monitor mode to an active regulator mode such that the Type 627M or 627HM should have a 3/8 in. / 9.5 mm or larger orifice.

Shaded areas indicate that Fluorocarbon (FKM) and Nylon (PA) disk material are not available.

For inlet pressure in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specifications section.
Maximum inlet pressure for Type 627OSX is limited to 1500 psi / 103 bar.
For pressure settings under 10 psig / 0.69 bar, inlet pressure should be limited to approximately 100 psig / 6.9 bar so the setpoint adjustment can be obtained.
The unbalance forces change from the wide-open monitor mode to an active regulator mode such that the Type 627M or 627HM should have a 3/8 in. / 9.5 mm or larger orifice.

Table 2. Maximum Spring and Diaphragm Casing Pressure(1)

MAXIMUM PRESSURE DESCRIPTION

| __

DIAPHRAGM CASING MATERIAL

| __

TYPES 627 AND 627OSX

| __

TYPES 627R AND 627LR

| __

TYPES 627M AND 627MOSX

| __

TYPE 627MR

| TYPES 627H, 627HM,

627HOSX AND

627HMOSX

---|---|---|---|---|---|---
psig| bar| psig| bar| psig| bar| psig| bar| psig| bar
Maximum pressure to spring and diaphragm casings to prevent leak to atmosphere other than relief action (internal parts damage may occur)| Die cast aluminum| __

250

| __

17.2

| __

250

| __

17.2

| Not Available| Not Available| Not Available
Ductile iron| __

250

| __

17.2

Steel or Stainless steel| 250| 17.2| 800| 55.2
Maximum pressure to spring and diaphragm casings to prevent burst of casings during abnormal operation (leak to atmosphere and internal parts damage may occur)| Die cast aluminum| 375| 25.9| 375| 25.9| Not Available| Not Available| __

Not Available

Ductile iron| 465| 32.1| 465| 32.1| 465| 32.1| 465| 32.1
Steel or Stainless steel| 1500| 103| 1500| 103| 1500| 103| 1500| 103| 1500| 103
Maximum diaphragm casing overpressure (above setpoint) to prevent damage to internal parts| All materials| 60| 4.1| 120| 8.3| 60| 4.1| 120| 8.3| 120| 8.3
1. If the spring case is pressurized, a metal adjusting screw cap is required. Contact your local Sales Office for details.

Type 627M or 627HM Regulator De-Icer System Application For the Type 627M or 627HM regulator de-icer system, refer to the application shown in Figure 3. With a large pressure drop across the working regulator, ice can form within this regulator. The formation of ice decreases the size of the orifice, so the regulator is unable to supply enough flow to satisfy the downstream demand.

When the downstream pressure falls below the outlet pressure setting of the Type 627M or 627HM regulator, the disk assembly of the Type 627M or 627HM regulator moves off its orifice, permitting alcohol to flow into the main gas line. The alcohol carried to the main regulator by the flowstream prevents additional ice from forming on the orifice. When normal flow resumes and as pressure in the downstream system is restored, the Type 627M or 627HM regulator shuts off.

Overpressure Protection
The 627 Series regulators have outlet pressure ratings that are lower than their inlet pressure ratings. A pressure-relieving or pressure-limiting device must be provided by the user for the Types 627, 627H, 627M and 627HM regulators if the inlet pressure can exceed the outlet pressure rating, since these regulators do not have internal relief. Types 627R and 627LR regulators provide internal relief which limits the total outlet pressure buildup over setpoint. Use Tables 3 and 4 to determine the total outlet pressure. This internal relief may be adequate for the application, if not, provide additional pressure relief or a pressure-limiting device downstream.

Types 627OSX utilizes integral slam-shut device to provide overpressure and underpressure protection by completely shutting off the flow of gas to the downstream system.
Pressure is registered on one side of the diaphragm, piston or bellows and is opposed by the setpoint control spring of the manometric sensing device. The Type OS2 slam-shut valve tripping pressure is determined by the setting of the control spring.

Overpressure– When the downstream pressure increases above the setpoint, the pressure on top of the diaphragm overcomes the spring setting and moves the manometric device stem.
Underpressure–When the downstream pressure decreases below the setpoint, the control spring pressure below the diaphragm overcomes the downstream pressure and pushes the diaphragm which moves the manometric device stem. See Type OS2 Instruction Manual (D102778X012) for additional information.

Startup and Adjustment

To avoid personal injury or property damage due to explosion or damage to regulator or downstream components during startup, release downstream pressure to prevent an overpressure condition on the diaphragm of the regulator. In order to avoid an overpressure condition and possible equipment damage, pressure gauges should always be used to monitor pressures during startup.

Slowly open the upstream shut-off valve.
Slowly open the downstream shut-off valve.
Check all connections for leaks.
Make final control spring adjustments according to the adjustment procedures. $Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $2$$

Adjustment
The range of allowable pressure settings is marked on the nameplate. If a pressure setting beyond this range is necessary, substitute the appropriate regulator control spring. Change the nameplate to indicate the new pressure range. Before increasing the setting, refer to Table 1, 2, 3 or 4. Review the pressure limits for the control spring range being used and be certain that the new pressure setting will not result in an overpressure condition.

Note
Always use a pressure gauge to monitor pressure when making adjustments. Refer to Figures 7 through 13 for key number locations.

Remove the adjusting screw cap (key 36).
Loosen the locknut (key 34).
Increase the outlet pressure setting by turning the adjusting screw (key 35) clockwise. Decrease the outlet pressure setting by turning the adjusting screw counterclockwise.
When the desired pressure is obtained, hold the adjusting screw (key 35) in place and tighten the locknut (key 34).
Refer to Type OS2 Instruction Manual (D102778X012) for instructions on adjusting the slam-shut.

Shutdown

WARNING
To avoid personal injury or property damage due to explosion or damage to regulator or downstream components during shutdown, release downstream pressure to prevent an overpressure condition on the diaphragm of the regulator.

Close the nearest upstream shut-off valve.
Close the nearest downstream shut-off valve.
Open the vent valve between the regulator and the downstream shut-off valve nearest to it.
For a Type 627, 627H, 627R or 627LR regulator, the regulator will open to release pressure between the upstream shut-off valve and the regulator.
A Type 627M, 627HM or 627MR regulator requires venting the control line and downstream pressure from the regulator before maintenance.
The pressure between these shut-off valves is released through the open regulator because the disk assembly remains open in response to the decrease in control line pressure.
Type 627OSX with under pressure protection may trip and trap gas upstream of the regulator. It is recommended to also open an upstream vent to allow gas to escape.

Table 3. Type 627R Internal Relief Performance(1)

OUTLET PRESSURE RANGE, SPRING PART NUMBER AND COLOR CODE

| __

OUTLET PRESSURE SETTING

| MAXIMUM ALLOWABLE DOWNSTREAM SYSTEM PRESSURE| MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE DOWNSTREAM SYSTEM PRESSURE FROM BEING EXCEEDED (2)|
---|---|---|---|---
Orifice Size, In. / mm|
3/32 / 2.4| 1/8 / 3.2| 3/16 / 4.8| 1/4 / 6.4| 3/8 / 9.5| 1/2 / 13|
psig| bar| psig| bar| psig| bar| psig| bar| psig| bar| psig| bar| psig| bar| psig| bar|
__

5(3) to 20 psig /

0.34 to 1.4 bar

10B3076X012

Yellow

| __

0.69

| 60

100

125

175

200

250

| 4.1

6.9

8.6

12.1

13.8

17.2

| 1250

2000

| 86.2

138

| 740

1500

1900

2000

| 51.0

103

131

138

| 320

620

| 22.1

42.7

| 190

390

480

| 13.1

26.9

33.1

| 95

180

220

| 6.6

12.4

15.2

| 75 130

160

| 5.2

9.0

11.0

|
830

1100

1300

1600

| 57.2

75.8

89.6

110

670

770

960

| 46.2

53.1

66.2

| 320

360

450

| 22.1

24.8

31.0

| 220

260

320

| 15.2

17.9

22.1

|
__

| __

1.0

| 60

100

125

175

200

250

| 4.1

6.9

8.6

12.1

13.8

17.2

| 1000

2000

| 69.0

138

| 620

1400

1900

2000

| 42.7

96.5

131

138

| 260

610

| 17.9

42.1

| 170

370

480

| 11.7

25.5

33.1

| 90

170

220

| 6.2

11.7

15.2

| 70 130

160

220

| 4.8

9.0

11.0

|
810

1100

1300

1600

| 55.8

75.8

89.6

110

670

770

960

| 46.2

53.1

66.2

| 320

360

450

| 22.1

24.8

31.0

| 260

320

| 15.2

17.9

22.1

|
__

| __

1.4

| 60

100

125

175

200

250

| 4.1

6.9

8.6

12.1

13.8

17.2

| 850

2000

| 58.6

138

| 490

1300

1800

2000

| 33.8

89.6

124

138

| 210

600

| 14.5

41.4

| 130

360

480

| 9.0

24.8

33.1

| 80

170

220

| 5.5

11.7

15.2

| 65

120

160

| 4.5

8.3

11.0

|
800

1100

1300

1600

| 55.2

75.8

89.6

110

670

770

960

| 46.2

53.1

66.2

| 320

360

450

| 22.1

24.8

31.0

| 220

260

320

| 15.2

17.9

22.1

|
__

15 to 40 psig /

1.0 to 2.8 bar

10B3077X012

Green

| __

1.0

| 60

100

125

175

200

250

| 4.1

6.9

8.6

12.1

13.8

17.2

| 1000

2000

| 69.0

138

| 380

1300

1800

2000

| 26.2

89.6

124

138

| 210

590

800

1100

1300

1600

| 14.5

40.7

55.2

75.8

89.6

66.2

| 130

350

470

640

| 9.0

24.1

32.4

44.1

| 80

170

220

| 5.5

11.7

15.2

| 65

120

160

| 4.5

8.3

11.0

|
320

370

450

| 22.1

25.5

31.0

| 220

260

320

| 15.2

17.9

22.1

|
780

960

| 53.8

66.2

| __

1.4

| 60

100

125

175

200

250

| 4.1

6.9

8.6

12.1

13.8

17.2

| 630

2000

| 43.4

138

| 200

1200

1700

2000

| 13.8

82.7

117

138

| 150

550

760

1100

1300

1600

| 10.3

37.9

52.4

75.8

89.6

66.2

| 100

330

450

630

| 6.9

22.8

31.1

43.4

| 70

160

210

| 4.8

11.0

14.5

| 65

120

160

| 4.5

8.3

11.0

|
320

360

460

| 22.1

24.8

31.7

| 220

260

320

| 15.2

17.9

22.1

|
770

960

| 53.1

66.2

| __

2.1

| 100

125

175

200

250

| 6.9

8.6

12.1

13.8

17.2

| 2000

2000

| 138

138

| 950

1500

2000

| 65.5

103

138

| 450

670

1000

1200

1600

| 31.1

46.2

69.0

82.7

110

| 260

400

610

| 17.9

27.6

42.1

| 140

190

300

| 9.7

13.1

20.7

| 110

150

| 7.6

10.3

|
220

260

320

| 15.2

17.9

22.1

|
760

970

| 52.4

66.9

| 360

460

| 24.8

31.7

| __

2.8

| 100

125

175

200

250

| 6.9

8.6

12.1

13.8

17.2

| 1500

2000

| 103

138

| 700

1300

1800

2000

| 48.3

89.6

124

138

| 330

560

1000

1200

1600

| 22.8

38.6

69.0

82.7

110

| 200

340

550

730

| 13.8

23.4

37.9

50.3

| 120

180

290

| 8.3

12.4

20.0

| 108

140

| 7.4

9.7

|
220

250

320

| 15.2

17.2

22.1

|
350

460

| 24.1

31.7

970| 66.9
– Shaded areas indicate maximum inlet pressures allowed during system malfunction only. Table 1 gives the maximum inlet pressure for normal regulator operation.

1. The internal relief performance values are obtained by removing the disk assembly.

2. For inlet pressures in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specifications section.

3. For pressure settings under 10 psig / 0.69 bar, inlet pressure should be limited to approximately 100 psig / 6.9 bar so the setpoint adjustment can be obtained.

Maintenance

Unless otherwise specified, the following maintenance procedures apply to all types of regulators. For a summary of maximum torque values required for all types of regulators, refer to Table 7. Due to normal wear, damage from external sources or debris in the air or gas line, regulator parts such as the disk assembly orifice and diaphragm must be inspected periodically and replaced as necessary to ensure correct performance. The frequency of inspection and replacement depends upon the severity of conditions and the requirements of state and federal laws.

Normal wear of the orifice and disk assembly is accelerated with high pressure drops and with large amounts of impurities in the flowstream. Instructions are given below for replacing the disk assembly orifice, diaphragm and O-rings. These procedures may also be used for disassembly required for inspection and replacement of other parts.

Note
Special tool required for Type 627OSX Orifice Maintenance. 14 mm Hex with a 4 in. / 102 mm extension required to reach orifice. Refer to Type OS2 Instruction Manual (D102778X012) for instructions on maintaining the slam- shut. Problem Indication for Types 627R, 627LR and 627MR Regulators

WARNING
Isolate the regulator from all pressure to avoid personal injury and equipment damage due to explosion or sudden release of process pressure. Cautiously release pressure from the regulator before attempting disassembly.

Table 3. Type 627R Internal Relief Performance(1) (continued)

OUTLET PRESSURE RANGE, SPRING PART NUMBER AND

COLOR CODE

| __

OUTLET PRESSURE SETTING

| MAXIMUM ALLOWABLE DOWNSTREAM SYSTEM PRESSURE| MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE DOWNSTREAM SYSTEM PRESSURE FROM BEING EXCEEDED (2)(3)|
---|---|---|---|---
Orifice Size, In. / mm|
3/32 / 2.4| 1/8 / 3.2| 3/16 / 4.8| 1/4 / 6.4| 3/8 / 9.5| 1/2 / 13|
psig| bar| psig| bar| psig| bar| psig| bar| psig| bar| psig| bar| psig| bar| psig| bar|
__

35 to 80 psig /

2.4 to 5.5 bar

10B3078X012

Blue

| __

2.8

| 125

150

175

200

250

| 8.6

10.3

12.1

13.8

17.2

| 2000

2000

| 138

138

| 1100

1600

2000

| 75.8

110

138

| 500

750

980

1200

1600

| 34.5

51.7

67.6

82.7

110

| 300

440

580

720

| 20.7

30.3

40.0

49.6

| 170

230

290

| 11.7

15.9

20.0

| 140

180

| 9.7

12.4

|
220

250

320

| 15.2

17.2

22.1

|
340

450

| 23.4

31.0

940| 64.8
__

| __

3.4

| 125

150

175

200

250

| 8.6

10.3

12.1

13.8

17.2

| 1400

2000

| 96.5

138

| 820

1400

1900

2000

| 56.5

96.5

131

138

| 400

650

700

1100

1500

| 27.6

44.8

48.3

75.8

103

| 230

370

530

670

| 15.9

25.5

36.5

46.2

| 150

210

270

| 10.3

14.5

18.6

| 140

170

| 9.7

11.7

|
210

240

320

| 14.5

16.5

22.1

|
330

430

| 22.8

29.6

920| 63.4
__

| __

4.1

| 125

150

175

200

250

| 8.6

10.3

12.1

13.8

17.2

| 900

1700

2000

| 62.1

117

138

| 450

1100

1700

2000

| 31.0

75.8

117

138

| 270

540

780

1000

1400

| 18.6

37.2

53.8

69.0

96.5

| 190

300

470

610

| 13.1

20.7

32.4

42.1

| 140

190

250

| 9.7

13.1

17.2

| 130

160

200

| 9.0

11.0

13.8

|
310

420

| 21.4

29.0

| 230

310

| 15.9

21.4

|
880| 60.7
__

| __

4.8

| 150

175

200

250

| 10.3

12.1

13.8

17.2

| 1200

2000

| 82.7

138

| 850

1400

2000

| 58.6

96.5

138

| 430

670

920

1300

| 29.6

46.2

63.4

89.6

| 250

400

550

| 17.2

27.6

37.9

| 170

230

| 11.7

15.9

| 160

190

| 11.0

13.1

|
280

400

| 19.3

27.6

| 230

310

| 15.9

21.4

|
830| 57.2
__

| __

5.5

| 150

175

200

250

| 10.3

12.1

13.8

17.2

| 800

1500

2000

| 55.2

103

138

| 500

1200

1700

2000

| 34.5

82.7

117

138

| 300

550

800

1200

| 20.7

37.9

55.2

82.7

| 200

330

480

| 13.8

22.8

33.1

| 160

210

270

| 11.0

14.5

18.6

| 150

190

| 10.3

13.1

|
220

300

| 15.2

20.7

|
770| 53.1| 390| 26.9
__

70 to 150 psig /

4.8 to 10.3 bar

10B3079X012

Red

| __

4.8

| 175

200

250

| 12.1

13.8

17.2

| 1900

2000

| 131

138

| 600

1200

2000

| 41.4

82.7

138

| 400| 27.6| 260| 17.9| 200| 13.8| 175| 12.1|
630

1100

| 43.4

75.8

| 380

680

| 26.2

46.9

| 250

360

| 17.2

24.8

| 210

290

| 14.5

20.0

|
__

| __

5.5

| 175

200

250

| 12.1

13.8

17.2

| 1400

2000

| 96.5

138

| 250

960

2000

| 17.2

66.2

138

| 240| 16.5| 200| 13.8| 190| 13.1| 175| 12.1|
520

1000

| 35.9

69.0

| 330

620

| 22.8

42.7

| 240

350

| 16.5

24.1

| 210

280

| 14.5

19.3

|
100| 6.9| 200

250

| 13.8

17.2

| 1500

2000

| 103

138

| 250

1600

| 17.2

110

| 240| 16.5| 230| 15.9| 210

320

| 14.5

22.1

| 210

270

| 14.5

18.6

|
770| 53.1| 520| 35.9
125| 8.6| 250| 17.2| 2000| 138| 1000| 69.0| 500| 34.5| 390| 26.9| 290| 20.0| 260| 17.9|
150| 10.3| 250| 17.2| 1200| 82.7| 260| 17.9| 260| 17.9| 260| 17.9| 260| 17.9| 260| 17.9|
– Shaded areas indicate maximum inlet pressures allowed during system malfunction only. Table 1 gives the maximum inlet pressure for normal regulator operation.

1. The internal relief performance values are obtained by removing the disk assembly.

2. For inlet pressures in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specifications section.

3. For pressure settings under 10 psig / 0.69 bar, inlet pressure should be limited to approximately 100 psig / 6.9 bar so the setpoint adjustment can be obtained.

Table 4. Type 627LR Internal Relief Performance(1)

OUTLET PRESSURE RANGE, SPRING PART NUMBER AND COLOR CODE

| __

OUTLET PRESSURE SETTING

| __

MAXIMUM ALLOWABLE DOWNSTREAM SYSTEM PRESSURE

| MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE DOWNSTREAM SYSTEM PRESSURE FROM BEING EXCEEDED (2)
---|---|---|---
Orifice Size, In. / mm
3/32| / 2.4| 1/8| / 3.2| 3/16| / 4.8| 1/4| / 6.4
psig| bar| psig| bar| psig| bar| psig| bar| psig| bar| psig| bar
__

15 to 40 psig /

1.03 to 2.8 bar

10B3077X012

Green

| __

2.1

| 55| 3.8| 500| 34.5| 270| 18.6| 110| 7.6| 80| 5.5
60| 4.1| 850| 58.6| 480| 33.1| 200| 13.8| 120| 8.3
66| 4.5| 1000| 69.0| 660| 45.5| 290| 20.0| 175| 12.1
__

| __

2.8

| 66| 4.5| 380| 26.2| 190| 13.1| 85| 5.9| 80| 5.5
70| 4.8| 700| 48.3| 370| 25.5| 150| 10.3| 115| 7.9
75| 5.2| 1000| 69.0| 560| 38.6| 240| 16.5| 160| 11.0
1. The internal relief performance values are obtained by removing the disk assembly.

2. For inlet pressures in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specifications section.

Table 5. Flow Coefficients

ORIFICE| 3/4 NPT| NPS 1 / DN 25 BODY| NPS 1-1/4 / DN 32 BODY| NPS 2 / DN 50 BODY
---|---|---|---|---
__

In.

| __

| Wide-Open C g for External Relief Sizing| Wide-Open C v for External Relief Sizing| __

C 1

| Wide-Open C g for External Relief Sizing| Wide-Open C g for External Relief

Sizing for

Type 627OSX only

| Wide-Open C v for External Relief Sizing| __

C 1

| Wide-Open C g for External Relief Sizing| Wide-Open C v for External Relief Sizing| __

C 1

| Wide-Open C g for External Relief Sizing| Wide-Open C g for External Relief

Sizing for

Type 627OSX only

| Wide-Open C v for External Relief Sizing| __

C 1

3/32| 2.4| 6.9| 0.24| 29.2| 6.9| 6.8| 0.24| 28.5| 7.0| 0.23| 30.7| 6.9| 6.7| 0.23| 29.7
1/8| 3.2| 12.5| 0.43| 29.1| 12.5| 11.4| 0.43| 29.4| 12.1| 0.43| 28.0| 12.5| 11.2| 0.42| 29.5
3/16| 4.8| 29| 1.01| 28.6| 29| 27| 0.93| 31.2| 26| 0.92| 28.7| 29| 28.4| 1.02| 28.5
1/4| 6.4| 50| 1.63| 30.6| 50| 47.6| 1.71| 29.3| 43| 1.45| 30.0| 52| 47.5| 1.66| 31.3
3/8| 9.5| 108| 2.99| 36.1| 108| 107| 3.42| 31.6| 96| 3.33| 28.9| 115| 107.4| 3.39| 33.9
1/2| 13| 190| 4.87| 39.0| 190| 166.4| 5.29| 35.9| 168| 5.18| 32.4| 200| 169.1| 5.01| 39.9

Table 6. IEC Sizing Coefficients

ORIFICE SIZE| X T| __

F D

| __

F L

---|---|---|---
In.| mm| 3/4 NPT Body| NPS 1 / DN 25 Body| NPS 2 / DN 50 Body
3/32| 2.4| 0.539| 0.514| 0.558| __

0.50

| 0.85
1/8| 3.2| 0.536| 0.547| 0.539| 0.79
3/16| 4.8| 0.517| 0.616| 0.514| 0.85
1/4| 6.4| 0.592| 0.543| 0.620| 0.87
3/8| 9.5| 0.824| 0.632| 0.727| 0.89
1/2| 13| 0.962| 0.815| 1.01| 0.86

Table 7. Maximum Torque Values

KEY NUMBER (1)

| __

DESCRIPTION

| MAXIMUM TORQUE
---|---|---
Ft-lbs| N•m
2| Orifice| 25| 34
__

| Cap screw (with aluminum diaphragm casing)| 16| 22
Cap screw (with ductile iron or steel/stainless steel diaphragm casing)| 25| 34
18| Lever cap screw| 7| 9.5
22| Diaphragm connector nut| 17| 23
26| Guide retainer (for Types 627R, 627LR and 627MR only)| 3| 4.1
__

| Spring case cap screw (with aluminum or ductile iron diaphragm casing)| 7| 9.5
Spring case cap screw (with steel/stainless steel diaphragm casing)| 35| 47
__

| Diaphragm cap screw (with Type 627 or 627M)| 7| 9.5
Diaphragm cap screw (with Type 627H or 627HM)| 14| 19
75| Slam-Shut Valve orifice| 25| 34
1. Refer to Figures 7 through 13 for key number locations.

The vent assembly is equipped with a relief indicator (key 49, Figure 4). The cap for the relief indicator snaps over the vent assembly opening. If the relief valve opens wide, exhaust gas pops the cap off the screen vent assembly opening indicating a problem with the regulator. If the cap pops off, refer to the shutdown and to the Body Area Maintenance Procedures to inspect the disk assembly and orifice.

If the disk assembly and orifice are not damaged, refer to the Diaphragm and Spring Case Area Maintenance Procedures in this section. The disk assembly and orifice can be inspected, removed and replaced without removing the regulator body from the line connections. Refer to the Body Area Maintenance Procedures.

Body Area Maintenance Procedures
These procedures are for gaining access to the disk assembly orifice, diaphragm casing O-ring and stem assembly. All pressure must be released from the diaphragm casing before performing these steps.
While using the following procedures, refer to Figures 7 through 13 for key number locations.

Replacing the Disk Assembly or Orifice

To inspect and replace the disk assembly (key 9) or orifice (key 2), remove the cap screws (key 3, Figure 5) and separate the diaphragm casing (key 5) from the body (key 1).
Inspect and, if necessary, remove the orifice (key 2). If removed, coat the threads of the replacement orifice with lubricant and torque to 25 ft-lbs / 34 Nm.
Inspect the disk assembly (key 9) and, if necessary, remove the hair pin clip (key 13) that holds the disk assembly (key 9) in place.
If replacing the disk assembly is the only maintenance required, skip to step 16.

Replacing the Stem Assembly
If it is necessary to perform maintenance on the stem assembly, continue with steps 4 through 8 and 15 through 19 for Types 627, 627H, 627R and 627LR regulators or steps 9 through 19 for Types 627M, 627HM and 627MR regulators.

Perform steps 4 through 8 for Types 627, 627H, 627R, 627LR, 627OSX and 627HOSX Regulators only:
Use steps 5 through 8 to remove and replace the stem assembly.
Remove the boost body (key 6), stabilizer (key 7) and stem guide (key 8) from the diaphragm casing (key 5). Unhook and remove the stem (key 10) from the diaphragm casing (key 5).
Remove and inspect the diaphragm casing O-ring (key 4, Figure 7, 8, 9 or 12) and replace it if necessary.
Apply lubricant to a replacement diaphragm casing O-ring (key 4, Figure 7, 8, 9 or 12) and install it onto the boost body (key 6). Skip to step 14.
For the Type 627 or 627H regulators, be sure to insert the pitot tube (tab) into the outlet side of the body (see Figure 7 or 12). Skip to step 14.
Perform steps 9 through 19 for Types 627M, 627HM, 627MR, 627MOSX and 627HMOSX Regulators only:
Use steps 10 through 14 to remove and replace the stem assembly.
To remove the blocked throat (key 43), insert a screw driver blade into the groove provided in the throat and pry it out of the diaphragm casing (key 5). Inspect and replace parts as necessary.
Inspect and, if necessary, replace the blocked throat O-rings (key 44, Figure 5) and back-up rings (key 45, Figure 5).
Apply lubricant to replacement blocked throat O-rings (key 44) and back-up rings (key 45).
Apply lubricant to the replacement stem O-ring (key 11) and stem back-up rings (key 12) and install them on the stem (key 10).
For assembly, lubricate the stem (key 10) and insert the diaphragm casing (key 5) and hook it on the lever (key 15).
Lubricate the contact points of the lever (key 15).
Insert parts into the diaphragm casing (key 5) that were removed in steps 5 and 6 or step 10 (see Figure 5).
Install the disk assembly (key 9), line up the hole in the disk assembly and stem (key 10) and insert the hair pin clip (key 13).
Position the diaphragm casing (key 5) plus attached parts in relation to the body (key 1) so that they are correct for the application.
Secure the diaphragm casing (key 5) to the body with the cap screws (key 3, Figure 5). For an aluminum diaphragm casing, torque the cap screws (key 3) to 16 ft-lbs / 22 N•m. For ductile iron or steel diaphragm casings, torque the cap screws (key 3) to 25 ft-lbs / 34 N•m.
It may be necessary to reposition the diaphragm spring case to prevent rain, ice and foreign debris from entering the spring case. Refer to the Diaphragm and Spring Case Area Maintenance Procedures, steps 1, 2 and 21 through 25.

Diaphragm and Spring Case Area Maintenance Procedures
These procedures are for gaining access to the control spring, diaphragm assembly and lever assembly. All spring pressure must be released from the diaphragm casing before these steps can be performed.
While using the following procedures, refer to Figures 7 through 13 for key number locations.

Remove the adjusting screw cap (key 36), loosen the lock nut (key 34) and turn the adjusting screw (key 35) counterclockwise until all compression is removed from the control spring (key 32).
Remove the spring case cap screws (key 37), the nameplates and lift off the spring case (key 29). If changing the control spring (key 32) or repositioning the spring case (key 29) is the only maintenance required, install the replacement control spring or rotate the spring case so it is correct for the application. Skip to step 21. For diaphragm area maintenance, continue with step 3.
Remove the diaphragm limiter O-ring and diaphragm limiter (keys 51 and 50, on the Type 627H or 627HM only). Remove the diaphragm assembly by tilting it so that the pusher post (key 19) slips off the lever (key 15).
If it is necessary to replace the lever assembly, remove the lever cap screws (key 18). $Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $4$$
Install the replacement lever (key 15) into the lever retainer (key 16) by inserting the lever pin (key 17). Secure the lever assembly into the diaphragm casing with the cap screws (key 18) and torque the cap screws to 7 ft-lbs / 9.5 N•m.
If it is necessary to perform maintenance on the diaphragm assembly, continue with steps 6 through 11 and step 20 for Types 627, 627H, 627M, 627HM and all 627OSX variations regulators or steps 12 through 19 for Types 627R, 627LR and 627MR regulators. Perform steps 6 through 11 for Types 627, 627H, 627M, 627HM and all 627OSX variations Regulators only $Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $5$$
For Types 627, 627H, 627M and 627HM regulators (Figures 5 and 6), use steps 7 through 11 to disassemble and reassemble the diaphragm assembly.
Remove the diaphragm head cap screw (key 46), lower spring seat (key 31, Type 627 or 627M only) and diaphragm head (key 24). On the Type 627H or 627HM, remove the pusher post O-rings (key 52). Separate the diaphragm (key 23) from the pusher post (key 19).
Install the diaphragm (key 23), in reverse order in step 7, on the pusher post (key 19), insert and finger tighten the diaphragm head cap screw (key 46).
Hook the pusher post on the lever (key 15), then turn the diaphragm (key 23) to match the holes in the diaphragm with the holes in the spring casing.
Unhook the pusher post from the lever (key 15) and torque the diaphragm head cap screw (key 46) to 7 ft-lbs / 9.5 N•m for the Type 627 or 627M. On the Type 627H or 627HM, torque the diaphragm head cap screw to 14 ft-lbs / 19 N•m.
Hook the pusher post on the lever (key 15) and check the hole alignment. If necessary, loosen the cap screw (key 46) and reposition the diaphragm (key 23) on the pusher post (key 19). Retorque the screw (see step 10). Skip to step 20. Perform steps 12 through 19 for Types 627R, 627LR and 627MR Regulators only:
For Types 627R, 627LR and 627MR regulators (Figure 6), use steps 13 through 19 to disassemble and reassemble the diaphragm assembly.
Remove the guide retainer (key 26) and separate the diaphragm parts. Refer to Figure 6 for the sequence of parts.To remove the diaphragm (key 23), remove the diaphragm connector nut (key 22) and lift off the diaphragm head (key 24) and diaphragm (key 23) from the connector assembly (key 21). Do not attempt to disassemble the connector assembly (key 21).
Position the replacement diaphragm (key 23)on the connector assembly (key 21), install the diaphragm head (key 24) and connector nut (key 22), then torque to 17 ft-lbs / 23 N•m.
If necessary, replace the guide retainer O-ring (key 48) and, set the guide retainer (key 26) aside, ready for assembly.
On the pusher post (key 19) install the relief seal O-ring (key 28) and apply lubricant. Also, install the relief seal retainer (key 47), diaphragm connector assembly (key 21, with attached parts) relief spring (key 27), upper relief spring seat (key 33) and guide retainer (key 26). Torque the guide retainer (key 26) to 3 ft-lbs / 4.1 N•m.
Hook the pusher post (key 19) (with attached parts) on the lever (key 15) to check the alignment of the holes in
the diaphragm with the holes in the spring casing. If the holes do not line up, unhook the pusher post from the lever, hold the pusher post and rotate the diaphragm to the correct position.
Install the lower spring seat (key 31) over the relief spring so it rests flat on the connector nut (key 22).
Insert the diaphragm assembly into the diaphragm casing (key 5) and hook the pusher post on the lever (key 15).
Install the control spring (key 32) and upper spring seat (key 33) and apply lubricant to the upper spring seat (key 33).
Install the spring case (key 29) so that the screened vent assembly (key 30) is in the correct position for the application. Place the nameplates over the screw holes, insert the spring case cap screws (key 37) and finger tighten.
Screw in the adjusting screw (key 35) to put slack into the diaphragm (key 23).Using a crisscross pattern, finish tightening the spring case cap screws (key 37) to 7 ft-lbs / 9.5 N•m of torque.
If necessary, refer to the installation and/or the Startup and Adjustment procedures.
Install the adjusting locknut (key 34) after regulator adjustment.

Parts Ordering
When corresponding with your local Sales Office about this equipment, always reference the equipment serial number or FS number that can be found on the nameplate. When ordering replacement parts, reference the key number of each needed part as found in the following parts list. Separate kits containing all recommended spare parts are available. See Type OS2 Instruction Manual (D102778X012) for slam‑shut parts.

Parts List

Note
In this parts list, parts marked NACE are intended for corrosion-resistant service as detailed in the NACE International Standard MR0175.

Key Description Part Number

Type 627 Parts Kit with Aluminum/Nitrile (NBR) trim
(include keys 4, 9, 11, 12 and 23) R627X000A12
Type 627 Parts Kit with Stainless steel/ Nitrile (NBR) trim
(include keys 4, 9, 11, 12 and 23) R627X000S12
Type 627H Parts Kit with SST/Nylon (PA) trim R627HX00S12
Type 627R Parts Kit with Aluminum/ Nitrile (NBR) trim
(include keys 4, 9, 11, 12, 23, 28 and 48) R627RX00A12
Type 627R Parts Kit with Stainless steel/ Nitrile (NBR) trim
(include keys 4, 9, 11, 12, 23, 28 and 48) R627RX00S12 1 Body(1)
Ductile iron 1000 psig / 69.0 bar maximum inlet pressure 3/4
NPT 30B3046X012 1
NPT 30B3048X012 1-1/4
NPT ERAA42554A0 2 NPT 30B3096X012
Ductile iron (Long Body) 1000 psig / 69.0 bar maximum inlet pressure
NPT 39B2451X012 NPT 39B0414X012
Steel2000 psig / 138 bar maximum inlet pressure 3/4
NPT 30B3050X012
NPT 30B3051X012
NPT 30B7452X012
Steel (Long Body) 2000 psig / 138 bar maximum inlet pressure
NPT 39B0412X012
NPT 39B0415X012

Key Description

Body(1) (continued)
Steel, CL600 RF flanged
1500 psig / 103 bar maximum inlet pressure
NPS 1 / DN 25 40B6754X012
NPS 2 / DN 50 40B6756X012
Steel, CL300 RF flanged
750 psig / 51.7 bar maximum inlet pressure
NPS 1 / DN 25 41B8978X012
NPS 2 / DN 50 41B8080X012
Steel, CL150 RF flanged
290 psig / 20.0 bar maximum inlet pressure
NPS 1 / DN 25 43B8656X022
NPS 2 / DN 50 44B0666X012 Steel, BWE
1000 psig / 69.0 bar maximum inlet pressure
NPS 1 / DN 25 33B6723X012
NPS 2 / DN 50 38B1688X012
Steel, PN 16/25/40 RF
580 psig / 40.0 bar maximum inlet pressure
NPS 1 / DN 25 44B0386X012
NPS 2 / DN 50 44B3342X012
Stainless Steel(2), NPT
2000 psig / 138 bar maximum inlet pressure
3/4 NPT 30B3050X062
1 NPT 30B3051X092
2 NPT 30B7452X052
Stainless Steel(2), CL150 RF flanged
275 psig / 18.9 bar maximum inlet pressure
NPS 1 / DN 25 43B8656X052
NPS 2 / DN 50 44B0666X022
Stainless Steel(2), CL300 RF flanged
720 psig / 49.6 bar maximum inlet pressure
NPS 1 / DN 25 41B8978X072
NPS 2 / DN 50 41B8080X072
Stainless Steel(2), CL600 RF flanged
1440 psig / 99.2 bar maximum inlet pressure
NPS 1 / DN 25 40B6754X102
NPS 2 / DN 50 40B6756X062
Stainless Steel(2), PN 16/25/40 RF
580 psig / 40.0 bar maximum inlet pressure
NPS 1 / DN 25 44B0386X032
NPS 2 / DN 50 44B3342X032
Type 627OSX Bodies, Steel
Without Tap
NPS 1 / DN 25
NPT ERAA33145A0
SWE ERAA31302A0
CL150 RF ERAA44998A0
CL300 RF ERAA45039A0
CL600 RF ERAA45040A0
NPS 2 / DN 50
NPT ERAA33146A0
SWE ERAA32902A0
CL150 RF ERAA45027A0
CL300 RF ERAA45029A0
CL600 RF ERAA45031A0
With Tap NPS 1 / DN 25
NPT ERAA34615A0
SWE ERAA34616A0
CL150 RF ERAA45033A0
CL300 RF ERAA45038A0
CL600 RF ERAA45041A0
NPS 2 / DN 50
NPT ERAA34618A0
SWE ERAA34619A0
CL150 RF ERAA45028A0
CL300 RF ERAA45030A0
CL600 RF ERAA45032A0

Recommended spare part

Bodies can be used for both standard and NACE constructions.
Stainless steel body material can be used for applications in temperature ranges down to -40°F / -40°C and are only available for Types 627, 627R and 627H.

Orifice Aluminum

3/32 in. / 2.4 mm 0R044109022
1/8 in. / 3.2 mm 1A936709012
3/16 in. / 4.8 mm 00991209012
1/4 in. / 6.4 mm 0B042009012
3/8 in. / 9.5 mm 0B042209012
1/2 in. / 13 mm 1A928809012
303 Stainless steel
3/32 in. / 2.4 mm 0R044135032
1/8 in. / 3.2 mm 1A936735032
3/16 in. / 4.8 mm 00991235032
1/4 in. / 6.4 mm 0B042035032
3/8 in. / 9.5 mm 0B042235032
1/2 in. / 13 mm 1A928835032
316 Stainless steel, NACE construction only
3/32 in. / 2.4 mm 0R0441X0012
1/8 in. / 3.2 mm 1A9367X0022
3/16 in. / 4.8 mm 009912X0012
1/4 in. / 6.4 mm 0B0420X0012
3/8 in. / 9.5 mm 0B0422X0012
1/2 in. / 13 mm 1A9288X0012
3 Cap Screw (not shown), (2 required) 627 Series
For Ductile iron/Steel diaphragm case 1A560724052
For Aluminum diaphragm case (not applicable for Types 627H and 627HM) 1A352524052
Type 627 Only For Ductile iron/Steel diaphragm case 1A5607X0052
For Aluminum case with Steel diaphragm case 10A3869X012
For SST Case and body 1A5607X0052
For Aluminum Case and SST body 10A3869X022
Type 627OSX Only
For Steel Casings 1A560724052
For Ductile Iron Casings GF05446X572
4* Diaphragm Case O-ring
Nitrile (NBR)
For Type 627, 627H or 627R only 17A2325X022
Fluorocarbon (FKM)
For Types 627, 627R and 627LR only 10A0037X012
5 Diaphragm Case
For Type 627, 627R or 627LR
Aluminum without 1/8 in. / 3.2 mm gauge tap 40B3084X012
Aluminum with 1/8 in. / 3.2 mm gauge tap
for 627 Series (except Types 627H and 627HM) 11B5380X012
Ductile iron without 1/8 in. / 3.2 mm gauge tap 30B3053X012
Ductile iron with 1/8 in. / 3.2 mm gauge tap
for 627 Series (except Types 627H and 627HM) 31B0641X012
For Type 627, 627R or 627LR
Steel 30B3104X012
Ductile iron with 1/4 NPT gauge tap for
627 Series (except Types 627H and 627HM) 39A5987X012
Steel with 1/4 NPT gauge tap for 627 Series
(except Type 627H) 30B8734X012
For Type 627M or 627MR
Ductile iron 39A5987X012
Steel 30B8734X012
For Type 627H, Steel 30B3104X012
For Type 627, Stainless steel 30B3104X082
For Type 627HM, Steel 30B8734X012
6 Boost Body (not for Type 627M, 627HM
or 627MR), Delrin®
For Type 627 or 627H 30B3056X012
For Type 627R or 627LR 30B3057X012
7 Stabilizer Nitrile (NBR)
For Types 627, 627H, 627R and 627LR only 10B3060X012
Fluorocarbon (FKM) For Types 627, 627R and 627LR only 10B3060X022
8 Stem Guide (for Types 627, 627H, 627R and
627LR only), Powdered metal 20B3061X012
9* Disk Assembly (for all Orifice Size)
Aluminum holder and Nitrile (NBR) disk 1C4248X0212
303 Stainless steel holder and Nitrile (NBR) disk 1C4248X0202
Aluminum holder and Nylon (PA) disk 1C4248X00A2
303 Stainless steel holder and Nylon (PA) disk 1C4248X0062
316 Stainless steel holder and Nylon (PA) disk 1C4248X0262
316 Stainless steel holder and Nitrile (NBR) disk 1C4248X0252
303 Stainless steel holder and
Fluorocarbon (FKM) disk 1C4248X0052
Aluminum holder and Fluorocarbon (FKM) disk 1C4248X0182
316 Stainless steel holder and
Fluorocarbon (FKM) disk 1C4248X0192
10 Stem 303 Stainless steel 10B3059X012
316 Stainless steel (NACE) 10B3059X022
11* Stem O-ring $Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $6$$
Nitrile (NBR) 1D687506992
Fluorocarbon (FKM) For Types 627, 627R,
627LR, 627M and 627MR only 1N430406382
12* Stem Back-up Ring,
Polytetrafluoroethylene (PTFE) (2 required) 1K786806992
13 Hair Pin Clip, Stainless steel 10B3058X012
14 Drive Pin, Plated steel 1H3671X0012
15 Lever, Plated steel 20B3063X012
16 Lever Retainer, Plated steel 30B3097X012
17 Lever Pin
Stainless steel 10B3083X012
316 Stainless steel (NACE) 10B3083X022
18 Lever Cap Screw (2 required)
Plated steel 10B7454X012
316 Stainless steel (NACE) 1B2905X0012
19 Pusher Post, Aluminum
For Type 627, 627-OSX, 627M or 627M-OSX 10B3089X012
For Type 627R, 627LR or 627MR ERAA51240A0
For Type 627C, Stainless steel ERAA51241A0
For Type 627H, 627H-OSX, 627HM or 627HM-OSX
Stainless steel ERAA51241A1
Stainless steel (NACE) ERAA51241A0
21 Diaphragm Connector (for Type 627R, 627LR
or 627MR only), Stainless steel 28B8832X012
22 Diaphragm Connector Nut (for Type 627R, 627LR
or 627MR only), Stainless steel 10B7449X012 23* Diaphragm
Nitrile (NBR) For Types 627 or 627M with Aluminum or
Ductile iron diaphragm case 10B3069X012
For Types 627 or 627M with
Steel diaphragm case 10B8735X012
For Types 627R, 627LR or 627MR with
Aluminum or Ductile iron diaphragm case 10B3068X012
For Types 627R, 627LR or 627MR with
Steel diaphragm case 10B8736X012
For Types 627H or 627HM with Steel
diaphragm case (diaphragm is Neoprene (CR)
with Nylon (PA) fabric) 12B0178X012
Fluorocarbon (FKM)
For Types 627R, 627LR and 627MR
with Steel case 10B8736X022
For Types 627 and 627M with Steel case 10B8735X042
For Types 627R, 627LR and 627MR
with Ductile iron and Aluminum Casing 10B3068X022
For Types 627 and 627M
with Ductile iron and Aluminum Casing 10B3069X032
24 Diaphragm Head, Plated steel
For Type 627 or 627M, Plated steel 1D666428982
For Type 627R, 627LR or 627MR, Plated steel 10B3071X012
For Type 627H or 627HM, 416 Stainless steel 12B0175X01225 Relief Spring Seat (For Type 627R or
627MR only), Steel 10B7446X012
26 Guide Retainer (For Type 627R, 627LR or
627MR only), Stainless steel 10B7450X012
27 Relief Spring (For Type 627R or 627MR only),
Plated steel 10B6757X012
For Type 627LR 1B541327022
28* Relief Seal O-ring
Nitrile (NBR)
For Type 627R, 627LR or 627MR only 1J108506992
Fluorocarbon (FKM)
For Types 627R, 627LR and 627MR only 1J1085X0042
29 Spring Case
For Type 627, 627R or 627LR
Aluminum 40B3086X012
Ductile iron 30B3055X012
Steel 30B3102X012
Stainless steel (Types 627 and 627R only) 30B3102X092
29 Spring Case (continued)
For Type 627M or 627MR
Ductile iron 30B3055X012
Steel 30B3102X012
For Type 627H or 627HM
Steel 30B3102X012
Stainless steel (Type 627H only) 30B3102X092
30 Screened Vent Assembly, Plastic 10B3093X012
31 Lower Spring Seat, Plated steel
For Type 627 or 627M 1D666625072
For Type 627R, 627LR or 627MR 20B3073X012
32 Control Spring, Plated steel
5 to 20 psig / 0.34 to 1.4 bar, Yellow 10B3076X012
15 to 40 psig / 1.0 to 2.8 bar, Green 10B3077X012
35 to 80 psig / 2.4 to 5.5 bar, Blue 10B3078X012
70 to 150 psig / 4.8 to 10.3 bar, Red 10B3079X012
140 to 250 psig range / 9.7 to 17.2 bar, Blue,
used for Type 627H or 627HM 10B3078X012
240 to 500 psig range / 16.5 to 34.5 bar, Red,
used for Type 627H or 627HM 10B3079X012
33 Upper Spring Seat, Plated steel 1D667125072
34 Locknut, Plated steel 1D667728982
35 Adjusting Screw, Plated steel
For Type 627, 627M, 627H or 627HM 10B3081X012
For Type 627R, 627LR or 627MR 10B3080X012
36 Adjusting Screw Cap, Plastic 20B3082X012
37 Spring Case Cap Screw, Plated steel (8 required)
For Aluminum or Ductile iron diaphragm case 1A391724052
For Steel diaphragm case 1A368324052
For Stainless steel case and body 1A3683X0062
For Aluminum case and SST body 1A3917X0062
For Type 627H/HM, Steel diaphragm case 1A346424052
For Type 627H, Stainless steel case and body 1A3464X0022
43 Blocked Throat (For Type 627M, 627HM or
627MR only), Stainless steel 10B3085X012
44* Blocked Throat O-ring
Nitrile (NBR) For Type 627M, 627HM or
627MR only (2 required) 1E264306992 Fluorocarbon (FKM)
For Types 627M and 627MR only 1E2643X0022
45* Blocked Throat Back-up Ring (For Type 627M,
627HM or 627MR only), PTFE (2 required) 10B3106X012
46 Diaphragm Head Cap Screw, Steel
For Type 627 or 627M 1B290524052
For Type 627H or 627HM 1C379124052
47 Relief Seal Retainer (For Type 627R, 627LR or
627MR only), Stainless steel 10B7445X012
48* Guide Retainer O-ring Nitrile (NBR)
For Type 627R, 627LR or 627MR only 1D682506992
Fluorocarbon (FKM)
For Types 627R, 627LR and 627MR only 1N423906382
49 Relief Indicator (For Type 627R, 627LR or
627MR only), Rubber (not shown) 30B3100X012
50 Diaphragm Limiter
(For Types 627H and 627HM only) 22B0176X012
51* Diaphragm Limiter O-ring
For Types 627H and 627HM only 1K877606992
52* Pusher Post O-ring (2 required)
For Types 627H and 627HM only 1C853806992
58 Pipe Plug, Zinc 1D8293T0022
67 Drive Screw, 18-8 Stainless steel 1A368228982
72 Pipe Plug, Zinc-plated steel 1A767524662
75* Slam-shut seat ERAA32884A0
76* O-ring GE29958X012

APPLY LUBRICANT(1)
L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE
L2 = EXTREME LOW-TEMPERATURE BEARING GREASE

$Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $7$$

PARTS NOT SHOWN: 3
Lubricants must be selected such that they meet the temperature requirements.

$Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $8$$

APPLY LUBRICANT(1)
L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE
L2 = EXTREME LOW-TEMPERATURE BEARING GREASE

$Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $9$$

PARTS NOT SHOWN: 3
Lubricants must be selected such that they meet the temperature requirements.
$Emerson Fisher 627 Series Pressure Reducing Regulators Instruction Manual Featured Image: No file chosen Update Post Add MediaVisualText Paragraph P Close dialog Add media Actions Upload filesMedia Library Filter mediaFilter by type Uploaded to this post Filter by date All dates Search Media list Showing 16 of 16 media items Load more ATTACHMENT DETAILS Emerson-Fisher-627-Series- Pressure-Reducing-Regulators-fig-10.png January 17, 2024 93 KB 764 by 769 pixels Edit Image Delete permanently Alt Text Learn how to describe the purpose of the image$opens in a new tab$. Leave empty if the image is purely decorative.Title Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $10$ Caption Description File URL: https://manuals.plus/wp- content/uploads/2024/01/Emerson-Fisher-627-Series-Pressure-Reducing- Regulators-fig-10.png Copy URL to clipboard ATTACHMENT DISPLAY SETTINGS Alignment Center Link To None Size Full Size – 764 × 769 Selected media actions 1 item selected Clear Insert into post No file chosen$

APPLY LUBRICANT(1)
L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE
L2 = EXTREME LOW-TEMPERATURE BEARING GREASE

$Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $11$$

PARTS NOT SHOWN: 3
Lubricants must be selected such that they meet the temperature requirements

APPLY LUBRICANT(1)
L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE
L2 = EXTREME LOW-TEMPERATURE BEARING GREASE

$Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $12$$

PARTS NOT SHOWN: 3
Lubricants must be selected such that they meet the temperature requirements.

APPLY LUBRICANT(1)

$Emerson-Fisher-627-Series-Pressure-Reducing-Regulators-fig- $13$$
L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE
L2 = EXTREME LOW-TEMPERATURE BEARING GREASE

PARTS NOT SHOWN: 3
Lubricants must be selected such that they meet the temperature requirements

APPLY LUBRICANT(1)
L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE
L2 = EXTREME LOW-TEMPERATURE BEARING GREASE

PARTS NOT SHOWN: 3
Lubricants must be selected such that they meet the temperature requirements.

APPLY LUBRICANT(1)
L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE
L2 = EXTREME LOW-TEMPERATURE BEARING GREASE

PARTS NOT SHOWN: 3
Lubricants must be selected such that they meet the temperature requirements

Americas
McKinney, Texas 75070 USA
T +1 800 558 5853
+1 972 548 3574

Europe
Bologna 40013, Italy
T +39 051 419 0611

Asia Pacific
Singapore 128461, Singapore
T +65 6777 8211
Middle East and Africa
Dubai, United Arab Emirates
T +971 4 811 8100

D101328X012 © 1986, 2023 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 05/23.
The Emerson logo is a trademark and service mark of Emerson
Electric Co. All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a business of Emerson Automation Solutions.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice. Emerson Process Management Regulator Technologies, Inc does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser

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Emerson Fisher 627 Series Pressure Reducing Regulators Instruction Manual

Emerson Fisher 627 Series Pressure Reducing Regulators Instruction Manual

Introduction

Description

Specifications

Product Description

Installation

Startup and Adjustment

Shutdown

Maintenance

Parts List

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