A check valve for an aircraft galley plumbing system having a valve body including an inlet for a potable water supply line, and first and second outlet ports leading to a distribution manifold. In a preferred embodiment, quick disconnects that include reverse flow inhibitors seal the valve's output ports. A vertical channel extends through the valve body for draining water through the valve, which is coupled to a pressure line connection port that exerts pressure from the aircraft's pressure system. A piston reciprocating across the vertical channel and biased by a spring is in fluid communication with the pressure line connection port, such that when water pressure is introduced from a pressure line to the connection port of sufficient pressure to collapse said spring, the piston blocks said channel, and when the water pressure is insufficient to collapse said spring then the piston retracts to open said channel.
Compact check valve for aircraft galley plumbing system
2016-10-18
Patent
Electronic Resource
English