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. Increasing head pressure with a regulating valve requires tightening adjustment screw "2" to further compress the internal spring, increasing the spring force required to open the valve and thus raising upstream pressure.