Parker GC Series Installation And Servicing Instructions

Gas cooler & flash gas bypass pressure regulating valves

Download this manual

Gas Cooler & Flash Gas Bypass

Pressure Regulating Valves

Type GC and FGB

INSTALLATION AND SERVICING INSTRUCTIONS

SD-398

The Sporlan GC and FGB valve families are stepper motor driven pressure regulating valves engi-

neered specifically for transcritical CO

for application as a Gas Cooler valve, but can also be applied as a Flash Gas Bypass valve. The FGB

family is designed to extend the capacity range of the GC valves when applied as Flash Gas Bypass

valves. Both families are rated for 140 barg (2030 psig) maximum working pressure. Offered with a

PSD4BX3XXXVP Valve Positioner and PSS4B Backup Power Module, the GC/FGB valves are easy to

implement, and feature:

• High resolution actuators with 2500 steps and 7.25 second full stroke actuation

• Uniquely characterized pin and port combinations for excellent full range flow control

• Cartridge valve designs with interchangeable bodies

• Tight seating capability

• Replaceable / serviceable screens (GC only)

For more information on these Sporlan Transcritical CO

INSTALLATION

Valves are shipped fully assembled, but must be disassembled prior to installation.

Supporting the valve body on the provided flats, loosen and remove the motor adapter assem-

bly using the 1-1/2" (38.1mm) hex flats.

NOTE: The motor adapter assemblies are extremely tight, so proper tools are required to support

and loosen the components. Be careful not to warp the body by clamping too tightly.

NOTE (FGB ONLY): If the valve has been energized at any time, the piston must be retracted prior

to disassembly. Failure to do so can permanently damage the valve. The valve pistons are shipped

at approximately half stroke, so if the valve has not been energized, retracting the piston is not

necessary.

(R-744) refrigeration systems. The GC family is designed

valves, please refer to Bulletin 100-80.

Page 1 Gas Cooler & Flash Gas Bypass Pressure Regulating Valves Type GC and FGB INSTALLATION AND SERVICING INSTRUCTIONS SD-398 The Sporlan GC and FGB valve families are stepper motor driven pressure regulating valves engi- neered specifically for transcritical CO (R-744) refrigeration systems. The GC family is designed for application as a Gas Cooler valve, but can also be applied as a Flash Gas Bypass valve.
Page 2 FGB ONLY – Remove the port using a standard 1-1/8” deep well socket. The gasket will now be loose, and should be removed from the body as well. Butt or socket weld the GC valve body into the system piping (1/2”, 3/4” or 1”connection). The FGB body can be installed with a butt weld (1”), or brazed with the ODF (1-1/8”) or ODM (1-3/8”) connection.
Page 3 Insert the motor adapter assembly into the valve body, and tighten using the 1-1/2” (38.1mm) hex flats. 55-80 N-m (40-60 ft.-lbs.) 40-60 N-m 55-80 N-m (30-45 ft.-lbs.) (40-60 ft.-lbs.) NOTE (FGB ONLY): If the valve has been energized at any time, the piston must be retracted prior to assembly.
Page 4 Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the components or systems.

Fgb series