| 摘要 |
In the embodiment shown, the invention comprises a suction/check valve (16) interposed in a gas inlet channel (14), the channel being open at one end for communication with the atmosphere, and at the opposite end for communication with a gas compressor inlet port (18). The valve has a bleed hole (32) formed therein for slowly blowing down the compressor receiver at shutdown. A second check valve (36) is operatively interposed between the receiver and the atmosphere for depressurizing the receiver when the compressor unloads. A circuit (24) which communicates with both valves provides a valve-operating, fluid, pilot-pressure to close off the suction/check valve, and to interdict its bleed hole, and to open the second check valve, with compressor unloading. |
