PILOT OPERATED VALVE

摘要

A valve for a refrigeration system includes a valve body having an inlet port, an outlet port, and walls forming a main cavity. The valve also includes a cartridge that resides within the main cavity and having a piston configured to travel in a first direction to permit fluid flow from the inlet port to the outlet port and in a second direction to impede fluid flow from the inlet port to the outlet port and a port plate configured to removably couple to the valve body to substantially close an end of the main cavity substantially enclosing the cartridge within the main cavity, the port plate including a plurality of ports, each port configured to accept at least one of various valve control elements configured to control the piston to permit or impede the fluid flow from the inlet port to the outlet port.

主权项

1. A valve for a refrigeration system comprising:
a valve body having an inlet, and outlet, and a valve seat, and a cavity; a port plate removably coupled to the valve body, and an inlet pressure passageway in fluid communication with the inlet port of the valve body and an outlet pressure passageway in fluid communication with the outlet port, such that the port plate functions to control a piston to open and close the valve; a cartridge disposed within the cavity of the valve body, the cartridge being accessible without disconnecting the valve from the system by removing the port plate from the valve body, the cartridge having a piston that engages the valve seat to close the valve and that disengages the valve seat to open the valve; a regulator for setting an actuation pressure of the valve, the regulator coupled to the port plate and having a passageway in communication with a passageway through the port plate to the cavity; and a manual opening mechanism including a valve stem for manually moving the piston to open and close the valve, the manual opening mechanism extending through an opening in the port plate that is in axial alignment with the piston, wherein the port plate is configured for removably coupling to the valve body in one of a number of different configurations for converting the valve from solenoid operation, to regulator operation, or to regulator operation with multiple functional features.