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? Illustration 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? Illustration GS-RA-14

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

Accepted Answer

Option A: "2" should be turned to further compress the spring. Rotating component '2' inward increases spring compression, requiring a higher operating pressure force to actuate the valve internals, thus directly raising the system operating head pressure set point.