Pressure adjuster valve and gas compressor using the same

摘要

To provide a pressure adjuster valve that may quickly and positively equalize the chamber pressures of two chambers with high reliability when the chamber pressures are reversed, and a gas compressor using this. In a structure of a pressure adjuster valve, a groove (56) is formed in an inner wall of communication passage, and a fine gap G between a valve body (55) and the communication passage (51) is partially broadened by the groove. For example, even if oil for lubrication left within the communication passage is formed into an oil film around the valve body, its continuity is cut by the groove of the inner wall of the communication passage. <IMAGE> <IMAGE>