Question 133Refrigeration/AC - 1st Asst/Chief70% to pass
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
AI Explanation
The correct answer is C.
The expansion valve designed to maintain a constant evaporator pressure rather than a constant evaporator superheat is the thermostatic expansion valve (TXV), which is represented by option C in the illustration. The TXV is designed to maintain a constant pressure in the evaporator by automatically adjusting the refrigerant flow based on changes in the evaporator load, which helps to optimize the system's performance.
The other options, A, B, and D, represent different types of expansion valves that are designed to maintain a constant evaporator superheat rather than a constant evaporator pressure.
Related Questions
#131 When a refrigeration compressor is in the 'off' cycle, the thermal expansion valve will react in what way? #132 In a refrigeration system, the pressure within the power element of a thermostatic expansion valve depends directly upon what factor? #134 The thermostatic expansion valve in a refrigeration system further opens when the diaphragm flexes downward. With all other conditions being the same, what single condition causes this? #135 In the illustrated refrigeration system, what is the proper name for the component labeled "A"? Illustration GS-RA-12 #136 The carbon seal ring of a refrigeration compressor crankshaft mechanical seal is held in position against the stationary ring face by using what device?