Emerson 627F- Manuals

Page 2 - Specifications

Type 627F 2 1. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded. Specifications The Specifications section gives some general specifications for the Type 627F regulator. The nameplates give detailed information for a particular r...

Page 3 - Description; Principle of Operation; system changes. Simultaneously, the pilot amplifies

Type 627F 3 Description The Type 627F pilot-operated (Type 6351F pilot) pressure reducing regulator (Figure 1) provides economical, accurate pressure control in a wide variety of applications using pressure factor measurement (fixed factor billing). The regulator can be used with natural gas, air, o...

Page 4 - Installation; Only personnel qualified through training and; WARNING

Type 627F 4 When downstream pressure increases due to lowered demand, greater pressure is registered on the pilot diaphragm and the lever side of the main regulator diaphragm. The pilot closes, and the excess loading pressure bleeds off to downstream, through the pilot restriction. With the lower lo...

Page 5 - Overpressure Protection; Startup and Adjustment; Startup; Make final pilot control spring adjustments; Adjustment

Type 627F 5 To remotely vent the pilot, remove the vent and install obstruction-free tubing or piping into the 1/4 NPT vent tapping. Provide protection on a remote vent by installing a screened vent cap into the remote end of the vent pipe. If the regulator requires repositioning, refer to the Body ...

Page 6 - Shutdown; Maintenance; as the disk assembly, orifice, and diaphragm must; Body Area Maintenance Procedures; The disk assembly and orifice can be inspected,

Type 627F 6 Note Always use a pressure gauge to monitor pressure when making adjustments. Shutdown ! WARNING To avoid personal injury, property damage due to explosion, or damage to regulator or downstream components during shutdown, release downstream pressure to prevent an overpressure condition o...

Page 7 - Replacing the Disk Assembly or Orifice; Note; Inspect and, if necessary, remove the orifice; Replacing the Stem Assembly; evenly to square up the orifice (key 2) and disk; Diaphragm and Spring Case Area

Type 627F 7 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 regulator before the following steps can be performed. Refer to Figure 3 for key number locations. Replacing the Disk Assembly or Ori...

Page 8 - Pilot; Trim Parts

Type 627F 8 seat bolt (key 61) into tension spring (key 32) until the spring is flush with the top of the bolt threads as shown in Figure 3. Rotate the spring case so it is correct for the application. Skip to step 14. For Diaphragm Area Maintenance, continue with step 3. 3. Remove the diaphragm ass...

Page 9 - Diaphragm Parts; Parts Ordering; When corresponding with your local Sales Office or; Parts List

Type 627F 9 Diaphragm Parts 1. Remove the closing cap (key 28), loosen the locknut (key 11), and back out the adjusting screw (key 10) to remove control spring (key 9) compression. 2. Remove the machine screws (key 12) and separate the spring case (key 2) from the body assembly (key 1). Remove the c...