Daikin-McQuay 258951301 Hot Gas Bypass Valve

The Daikin-McQuay 258951301 is a hot gas bypass valve that is used in rooftop heating, ventilation, and air conditioning systems. By controlling the refrigerant pressure, it protects the compressor, an essential part of the system. The valve stays open during compressor starting, allowing hot gas to return straight to the compressor inlet from the condenser, the part that releases heat. The valve progressively closes as the system pressure rises, sending the hot gas through the condenser for effective heat rejection. By avoiding excessive pressure buildup and possible compressor failure, this procedure guarantees dependable and effective HVAC operation. The valve serves as a safety switch, preventing damage to the system during startup and guaranteeing smooth functioning.