This single grade water loop vacuum pump is designed with assimilation of the international standard. By applying of impellor, made of excellent alloy copper, machinery seal, air inlet equipped with air valve, as well as coat disposal inside the pump, it is superiorities are: simple structure, small volume, high pump speed, high purity, less consumption, long working time, ect. It is widely used in Foodstuff machinery, Medicine package, Disinfectant Equipment, Weaving, Printing, Dyeing, Plastics, etc.