Compressor Service Valves: How the Three Positions Work
<p> A compressor service valve provides access to a refrigeration system for pressure measurement and certain service procedures. Service valves are commonly installed at the compressor’s suction or discharge connection. Moving the valve stem changes how the compressor, refrigerant line, and gauge port communicate. This article describes a common three-way compressor service valve. Valve designs differ, so check the instructions for the installed model before operating it.