If it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? GS-RA-14

Illustration GS-RA-14: the U.S. Coast Guard has not released this illustration.

Question

If it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? GS-RA-14

Illustration GS-RA-14: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option C: "2" should be turned to further compress the spring. Head pressure regulating valves maintain minimum condensing pressure by restricting condenser drainage. Turning adjustment screw '2' compresses the internal spring, requiring a higher upstream receiver pressure to overcome the spring force and open the valve.