Nanjing Shangair Mechanical and Electrical Co., Ltd is a hi-tech enterprise engaging in the research and development, manufacturing and sales of Shangair series high-grade piston air compressor and compressed air purification equipment. Our registered trademark is “shangair”. Equipped with such patented and the latest technology as “polygon cylindrical direct-flow valve”, our oil-free medium and high pressure piston air compressor for heavy industry use can work under environmental extremes, with such technical performance indicators as efficiency, service life, noise, vibration and fuel consumption being better than those of foreign and domestic compressors of the same kind. It is a classic piston air compressor for heavy industry use that can run safely and continuously 24 hours per day. Nanjing Shangair Mechanical and Electrical Co., Ltd has passed ISO9001：2008international quality management system certification. This system covers the design, development and service of reciprocating piston minitype air compressor, stationary reciprocating piston air compressor for general use and oil-free reciprocating piston air compressor.