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Emerson Fisher 627 Series Instruction Manual

Pressure reducing regulators
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Instruction Manual
Form 5252
07/89
627 Series Pressure Reducing Regulators
Introduction
Scope of Manual
This manual provides instructions for the installation,
adjustment, maintenance, and parts ordering for the
627 Series regulators. These regulators usually are
shipped separate for line installation, although some-
times they are shipped installed on other equipment.
Refer to the instruction manual for the other equipment
for installation and operating instructions.
W4793
Figure 1. Typical 627 Series Self-Operated
Pressure Reducing Regulator
Regulators
Description
The 627 Series self-operated pressure reducing regula-
tors (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 (see the AVAILABLE
CONFIGURATIONS specification in table 1).
Specifications
Table 1 gives some general specifications for the 627
Series regulators. The nameplates (figure 2) gives
detailed information for a particular regulator as it
comes from the factory.
10B3679-D
www.FISHERregulators.com
627 Series
Incorporates Errata dated January 2001
NUMBER 1
NUMBER 2
Figure 2. Nameplates

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Summary of Contents for Emerson Fisher 627 Series

  • Page 1 Instruction Manual 627 Series Form 5252 Incorporates Errata dated January 2001 07/89 627 Series Pressure Reducing Regulators Description Introduction The 627 Series self-operated pressure reducing regula- Scope of Manual tors (figure 1) are for high and low pressure systems. These regulators can be used with natural gas, air, or a This manual provides instructions for the installation, variety of other gases.
  • Page 2 627 Series Table 1. Specifications Available Constructions Maximum Body Outlet Pressure(1) (Type 627M, 627MR, and 627HM Only) Type 627: Self-operated pressure reducing regulator equipped with a pitot tube for greater regulated 2000 psig (138 bar) for screwed steel, 1480 psig capacities (figure 7) (102 bar) for RF flanged steel, or 1000 psig (69 bar) for ductile iron.
  • Page 3 627 Series Table 2. Maximum Inlet Pressures, Differential Pressures, and Outlet Pressure Ranges o l l o l l l n i c i f . e l , ) r l n i i t c c i f...
  • Page 4 627 Series Table 3. Maximum Spring and Diaphragm Casing Pressure(1) a l i a l i a l i a l i a l i i l e a l i a l i a l i e l i a l i v i t Like most regulators, 627 Series regulators have outlet...
  • Page 5 627 Series Figure 3. Schematic of De-Icer System connected to a straight section of outlet piping 10 diameters downstream of the regulator. 9. A hand valve should be installed in the control line. A regulator may vent some gas to the This hand valve can be used to throttle down and atmosphere.
  • Page 6 627 Series Table 4. Type 627R Internal Relief Performance f i r o l l form with in this regulator. The formation of ice de- Startup and Adjustment creases the size of the port opening, so the regulator is unable to supply enough flow to satisfy the downstream Startup demand.
  • Page 7 627 Series Table 4. Type 627R Internal Relief Performance (continued) f i r i l e . y l l n i c i f . e l , ) r l n i l n i o l l .
  • Page 8 627 Series Table 5. Maximum Torque Values • e l i e l i Note 3. Open the vent valve between the regulator and the downstream shutoff valve nearest to it. Always use a pressure gauge to monitor pressure when making adjustments. 4.
  • Page 9 627 Series Problem Indication for Type 627R and 627MR Regulators RELIEF INDICATOR CAP (KEY 49) 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.
  • Page 10 627 Series HAIR PIN CLIP LEVER STEM (KEY 10) DIAPHRAGM CASING (KEY 13) (KEY 15) O-RING (KEY 4) BODY DISK STEM BACKUP (KEY 1) ASSEMBLY RINGS (KEY 9) STEM GUIDE (KEY 12) (KEY 8) CAP SCREW (KEY 3) DIAPHRAGM CASING (KEY 5) STEM O-RING PITOT TUBE SEAT RING...
  • Page 11 627 Series DIAPHRAGM (KEY 23) DIAPHRAGM RELIEF VALVE O-RING HEAD (KEY 24) (KEY 28) DIAPHRAGM CONNECTOR PUSTHER POST NUT (KEY 22) (KEY 19) GUIDE RETAINER SPRING (KEY 32) O-RING (KEY 48) W4668* GUIDE RETAINER RELIEF SEAL UPPER SPRING LOWER SPRING DIAPHRAGM CONNECTOR (KEY 26) RETAINER (KEY 47)
  • Page 12 627 Series Perform steps 12 through 19 for Type 627R and 24. Using a crisscross pattern, finish tightening the 627MR Regulators only: spring case cap screws (key 37) to 7 foot-pounds (9 N•m) of torque. 12. For Type 627R and 627MR regulators (figure 6), use steps 13 through 19 to disassemble and reas- 25.
  • Page 13 627 Series Description Part Number Description Part Number Seat ring (continued) Diaphragm, nitrile (continued) 316 Stainless steel, NACE construction only For Type 627 or 627M w/steel 3/32-inch (2.4 mm) port diameter 0R0441X0012 diaphragm case 10B8735X012 1/8-inch (3.2 mm) port diameter 1A9367X0022 For Type 627R or 627MR w/aluminum 3/16-inch (4.8 mm) port diameter...
  • Page 14 627 Series 30B3092-D Figure 7. Type 627 Regulator Components...
  • Page 15 627 Series 30B3089-D Figure 8. Type 627R Regulator Components...
  • Page 16 627 Series 30B6433-C 1/4-INCH NPT CONNECTION Figure 9. Type 627M Regulator Components...
  • Page 17 627 Series 1/4-INCH NPT CONNECTION 30B6434-D Figure 10. Type 627MR Regulator Components...
  • Page 18 627 Series 31B5374-B Figure 11. Type 627H Regulator Components...
  • Page 19 627 Series 31B9872-B Figure 12. Type 627HM Regulator Components...
  • Page 20 ©Fisher Controls International, Inc., 1986, 1989; All Rights Reserved Fisher and Fisher Regulators are marks owned by Fisher Controls International, Inc. The Emerson logo is a trade mark and service mark of Emerson Electric Co. All other marks are the property of their respective owners.

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627627r627m627hm627h627mr