The small sized air compressor with the volume flow below 8m3/min designed and developed by UNITED OSD has the features of compact in structure, few moving parts and convenient in maintenance. It has integrated mechanics, electrical, air and cooling (including post cooling) and the imported products are used as the core parts to ensure high efficient and stability and advancement of technology. It has more excellent performance and reliability than that of the similar products. The small sized air compressors have been gone through the test of the market for many years and the timely supply of products can be ensured by a sufficient stock.