HANBELL Precise Machinery is expertise of screw technology .The main products of HANBELL included screw compressors, screw air compressors, low temperature screw compressors and screw vacuum pumps. PS series dry vacuum pumps include:simple structure;cold water motor design; explosion-proof motor; safe and reliable. Widespread use:semicon; electron; LED; TFT; pharmacy; chemical industry; solar; vacuum coating; heat treatment and other domains.