The forum, “Are Internal Leakage and Heat Transfer Required in a Standard for Method of Testing for Capacity of Four-Way Reversing Valves,” asked these “essential” questions:
- What are the causes of the leakage?
- How important is it?
- Is it significant?
It was pointed out that in the action of a four-way valve, the slide moves away from the ports in either the low- or high-pressure streams. “They interfere with each other,” an engineer stated, resulting in a loss of both heat and mass transfer.
“You lose mass flow and reduce suction pressure drop.” This, in turn, affects the efficiency and capacity of the compressor.