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

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

Accepted Answer

Option C: C. An Evaporator Pressure Regulator (EPR) operates downstream of the evaporator to throttle gas flow and maintain a minimum predetermined evaporator coil pressure and temperature, regardless of varying loads, rather than controlling superheat like a Thermostatic Expansion Valve.