Danfoss rotalock service valve, model 8168028, with a 1-3/4-12 rotalock thread and a 1-1/8" ODF sweat connection. Rotalock valves thread onto compressor service ports, suction and discharge stubs, and liquid receivers, providing a removable, gasket-sealed isolation point for service, evacuation, and compressor changeout in refrigeration and air-conditioning circuits.

Danfoss, headquartered in Nordborg, Denmark, is a long-established manufacturer of refrigeration controls, valves, and compressors. This V02-style valve carries the integral gauge port used for pressure readings and charging without opening the main refrigerant line.

Common uses: commercial refrigeration condensing units, walk-in cooler and freezer racks, semi-hermetic and scroll compressor service, and OEM replacement. New surplus, available from King Surplus inventory in Del Rio, Texas.