For many years at this point Roots Roots Vacuum Pump china vacuum pumps have already been well established in the area of vacuum technology. In mixture with backing pumps, which compress against the atmosphere, these pumps 
offer lots of advantages.
Features:
The main advantage of roots vacuum pump is a high pumping speed at the lower inlet pressure with high ultimate vacuum. Since the pump operating parts haven’t any contact, such as rotors and the end cover, so the pump overall performance is certainly stable and lengthy service time. low maintenance cost
Applications:
They’re widely used in vacuum smelting, vacuum welding, vacuum casting, vacuum coating, vacuum drying, vacuum dynamic experiment and chemical pharmaceutical, electric vacuum device manufacturing industries.
Because of the chemical substance, pharmaceutical and additional industries require huge vapor degassing capablity. the sealing structure of roots vacuum pump chamber and the bearing chamber has improved, which significantly reducing the bearing cavity and gear cavity oil emulsification. Hence, roots vacuum pump is certainly more suitable for pumping large quantities of drinking water vapor and solvent with drinking water ring vacuum pump.