Which of the following illustrated expansion valves is designed to maintain a constant evaporator pressure rather than a constant evaporator superheat? GS-RA-24

Illustration GS-RA-24: the U.S. Coast Guard has not released this illustration.

Question

Which of the following illustrated expansion valves is designed to maintain a constant evaporator pressure rather than a constant evaporator superheat? GS-RA-24

Illustration GS-RA-24: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option C: C. Component C illustrates an evaporator pressure regulator (EPR), which throttles to maintain a constant minimum pressure and temperature in the evaporator regardless of fluctuating external heat loads.