PRESSURE CHANGEOVER SYSTEM FOR COMPRESSED AIR

摘要

PROBLEM TO BE SOLVED: To provide a pressure changeover system for compressed air capable of leveling operation time by rotating operation with pressure setting and piping system of a plurality of compressors changed over. SOLUTION: This system includes a compressor 2a changeable to high pressure and low pressure, and at least three compressed air supply lines 22a including a first control valve 18a and a second control valve 20a. A high pressure system supply line system 32 connected via the first control valves 18a-18d and a low pressure system supply line system 34 connected via the second control valves 20a-20d are provided. One of the compressors is used as a back up compressor. Rotation operation of the compressors 2a-2d is controlled by opening and closing each first control valve 18a-18d and each second control valve 20a-20d to changeover to or shut off one of the high pressure system supply line system 32 and the low pressure system supply line system 34 corresponding to changeover of the compressors 2a-2d. COPYRIGHT: (C)2007,JPO&INPIT