This standard covers the specified operating conditions, models, basic parameters, requirements, test methods, inspection rules, signs, Encasement and storage of non-lubricated swing air compressors without prime movers. The scope of application includes air compressors with a nominal volume Flow rate of 4m ³/min~ 15m ³/min and a rated exhaust pressure not exceeding 0.3 MPa. The standard also lists a series of normative reference documents, including disc springs, positive displacement compressor acceptance tests, positive displacement noise compressor determination, etc. The specified operating conditions include suction pressure, suction temperature, relative humidity of suction, exhaust pressure and crankshaft Rotation speed.