Instruction Manual
D101328X012
March 2020
627 Series Pressure Reducing Regulators
!
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.
!
Personal injury, property damage, equipment
damage or leakage due to escaping gas or
bursting of pressure-containing parts may
WARNING
WARNING
W4793
Figure 1. Typical 627 Direct-Operated
Pressure Reducing Regulator
result if this regulator is overpressured 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 Type 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.
627 Series
Table of Contents
Related Manuals for Emerson Fisher 627 Series
Summary of Contents for Emerson Fisher 627 Series
- Page 1 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.
-
Page 2: Specifications
627 Series 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 Maximum Operating Inlet Pressure, Pressure Differential and Outlet Pressure Ranges Type 627: Direct-operated pressure reducing regulator See Table 1 for pressures by orifice size and equipped with a pitot tube for greater regulated... -
Page 3: Principle Of Operation
627 Series Specifications (continued) De-Icer System Approximate Weights See Figure 3 and Type 627M Regulator De-Icer 627 Series System Application section Ductile Iron, Steel or Stainless steel Casings: 10 lbs / 5 kg Relief Indicator Aluminum Casing: 6.3 lbs / 3 kg For Types 627R, 627LR and 627MR Type 627OSX (see Figures 8, 9 and 11) - Page 4 627 Series ADJUSTING SCREW CONTROL SPRING STEM DIAPHRAGM VALVE DISK PUSHER POST LEVER A6557 ORIFICE INLET PRESSURE INLET PRESSURE OUTLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE ATMOSPHERIC PRESSURE INLET PRESSURE Figure 2. Type 627 Operational Schematic OUTLET PRESSURE ATMOSPHERIC PRESSURE Type 627OSX must be installed in a horizontal position Procedures in the Maintenance section to reposition the and the mechanism box must be above or below the screened vent for the application.
- Page 5 627 Series Table 1. Maximum Inlet Pressures and Outlet Pressure Ranges OUTLET PRESSURE MAXIMUM INLET PRESSURE ORIFICE SIZE RANGE, SPRING TYPE Nylon (PA) Disk Nitrile (NBR) Disk Fluorocarbon (FKM) Disk PART NUMBER AND psig psig psig COLOR CODE 3/32 2000 1000 69.0 20.7...
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Page 6: Overpressure Protection
627 Series Table 2. Maximum Spring and Diaphragm Casing Pressure TYPES 627H, TYPES 627M 627HM, TYPES 627 TYPES 627R TYPE 627MR 627HOSX DIAPHRAGM AND 627OSX AND 627LR MAXIMUM PRESSURE DESCRIPTION 627MOSX CASING MATERIAL 627HMOSX psig psig psig psig psig Die cast aluminum Not Available Maximum pressure to spring and diaphragm Not Available... - Page 7 627 Series VENT VALVE GRAVITY FEED ALCOHOL DRIP POT TYPE 627M SET LOWER THAN WORKING REGULATOR CONTROL LINE NEEDLE HAND VALVE VALVE INLET A3725 WORKING REGULATOR Figure 3. De-Icer System Operational Schematic Shutdown Adjustment The range of allowable pressure settings is marked on the nameplate.
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Page 8: Maintenance
627 Series Table 3. Type 627R Internal Relief Performance MAXIMUM MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE DOWNSTREAM OUTLET ALLOWABLE SYSTEM PRESSURE FROM BEING EXCEEDED OUTLET PRESSURE PRESSURE DOWNSTREAM RANGE, SPRING Orifice Size, In. / mm SETTING SYSTEM PART NUMBER AND 3/32 / 2.4 1/8 / 3.2 3/16 / 4.8... - Page 9 627 Series Table 3. Type 627R Internal Relief Performance (continued) MAXIMUM MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE DOWNSTREAM OUTLET ALLOWABLE SYSTEM PRESSURE FROM BEING EXCEEDED (2)(3) OUTLET PRESSURE PRESSURE DOWNSTREAM RANGE, SPRING PART Orifice Size, In. / mm SETTING SYSTEM NUMBER AND 3/32 / 2.4...
- Page 10 627 Series 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 Wide-Open C Wide-Open C Wide-Open Wide-Open Wide-Open Wide-Open Wide-Open Wide-Open Wide-Open Wide-Open for External for External Relief Relief...
- Page 11 627 Series Perform steps 4 through 8 for Types 627, 627H, 627R, 627LR, 627OSX and 627HOSX Regulators only: 4. Use steps 5 through 8 to remove and replace the stem assembly. 5. Remove the boost body (key 6), stabilizer (key 7) and stem guide (key 8) from the diaphragm casing (key 5).
- Page 12 627 Series HAIR PIN CLIP (KEY 13) DIAPHRAGM CASING LEVER STEM (KEY 10) O-RING (KEY 4) (KEY 15) BODY DISK (KEY 1) ASSEMBLY STEM BACK-UP (KEY 9) RINGS STEM GUIDE (KEY 12) (KEY 8) SCREW (KEY 3) PITOT TUBE DIAPHRAGM BOOST AND TAB FOR CASING...
- Page 13 627 Series DIAPHRAGM (KEY 23) DIAPHRAGM RELIEF VALVE HEAD (KEY 24) O-RING (KEY 28) PUSHER POST DIAPHRAGM CONNECTOR (KEY 19) NUT (KEY 22) RELIEF VALVE SPRING (KEY 27) GUIDE RETAINER O-RING (KEY 48) GUIDE RETAINER RELIEF SEAL W4668 RELIEF SPRING DIAPHRAGM CONNECTOR LOWER SPRING (KEY 26)
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Page 14: Parts Ordering
627 Series 24. Using a crisscross pattern, finish tightening the spring Description Part Number case cap screws (key 37) to 7 ft-lbs / 9.5 N•m of torque. Body (continued) Steel, CL600 RF flanged 25. If necessary, refer to the installation and/or the Startup 1500 psig / 103 bar maximum inlet pressure and Adjustment procedures. - Page 15 627 Series Description Part Number Description Part Number Orifice Stem Guide (for Types 627, 627H, 627R and Aluminum 627LR only), Powdered metal 20B3061X012 3/32 in. / 2.4 mm 0R044109022 Disk Assembly (for all Orifice Size) 1/8 in. / 3.2 mm 1A936709012 Aluminum holder and Nitrile (NBR) disk 1C4248X0212...
- Page 16 627 Series Description Part Number Description Part Number Relief Spring Seat (For Type 627R or Adjusting Screw Cap, Plastic 20B3082X012 627MR only), Steel 10B7446X012 Spring Case Cap Screw, Plated steel Guide Retainer (For Type 627R, 627LR or (8 required) 627MR only), Stainless steel 10B7450X012 For Aluminum or ductile iron diaphragm case 1A391724052...
- Page 17 627 Series 30B3092_G APPLY LUBRICANT L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE L2 = EXTREME LOW-TEMPERATURE BEARING GREASE PARTS NOT SHOWN: 3 1. Lubricants must be selected such that they meet the temperature requirements. Figure 7. Type 627 Regulator Assembly...
- Page 18 627 Series 30B3089_G APPLY LUBRICANT L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE L2 = EXTREME LOW-TEMPERATURE BEARING GREASE PARTS NOT SHOWN: 3 1. Lubricants must be selected such that they meet the temperature requirements. Figure 8. Type 627R Regulator Assembly...
- Page 19 627 Series 38B4843_C APPLY LUBRICANT L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE L2 = EXTREME LOW-TEMPERATURE BEARING GREASE PARTS NOT SHOWN: 3 1. Lubricants must be selected such that they meet the temperature requirements. Figure 9. Type 627LR Regulator Assembly...
- Page 20 627 Series 30B6433_E APPLY LUBRICANT L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE L2 = EXTREME LOW-TEMPERATURE BEARING GREASE PARTS NOT SHOWN: 3 1. Lubricants must be selected such that they meet the temperature requirements. Figure 10. Type 627M Regulator Assembly...
- Page 21 627 Series 30B6434_E APPLY LUBRICANT L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE L2 = EXTREME LOW-TEMPERATURE BEARING GREASE PARTS NOT SHOWN: 3 1. Lubricants must be selected such that they meet the temperature requirements. Figure 11. Type 627MR Regulator Assembly...
- Page 22 627 Series 31B5374_D APPLY LUBRICANT L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE L2 = EXTREME LOW-TEMPERATURE BEARING GREASE PARTS NOT SHOWN: 3 1. Lubricants must be selected such that they meet the temperature requirements. Figure 12. Type 627H Regulator Assembly...
- Page 23 627 Series 31B9872_D APPLY LUBRICANT L1 = MULTI-PURPOSE LITHIUM POLYMER TYPE GREASE L2 = EXTREME LOW-TEMPERATURE BEARING GREASE PARTS NOT SHOWN: 3 1. Lubricants must be selected such that they meet the temperature requirements. Figure 13. Type 627HM Regulator Assembly...
- Page 24 Technologies, Inc. All rights reserved. 03/20. Emerson Automation Solutions 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...