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. Constant evaporator pressure expansion valves regulate refrigerant flow to maintain a steady, predetermined boiling pressure within the coil rather than tracking variable superheat. This prevents coil temperatures from dropping below freezing points in specialized marine air conditioning applications.