LV vacuum pump are usually used to pump gas and water vapor without solid particles, water-insoluble, non-corrosive gas, and the suction pressure can reach 33mbar absolute pressure (97% vacuum). The pump changing the material of pump host, it can also be used to pump corrosive gases or use corrosive liquids as working fluids. LV liquid/water ring pump are widely used in many processes in industrial production. Due to the rapid development of vacuum application technology, the application of water ring pumps is increasing.