3 or multi position service valve. If it was located in the exit of a liquid receiver it would be called a King Valve, or the entrance of Receiver would be called a Queen valve. Back seat is for normal operation to take the gauges off or put them on. mid or cracked to read pressures, front seat to isolate components. #love2hvac #hvac #cutopen #refrigeration #kingvalve #hvacarmy #howitworks #learnhvac
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