For many years now Roots vacuum pumps have been well established in the area of vacuum technology. In combination with 
backing pumps, which compress against the atmosphere, these pumps offer lots of Roots Vacuum Pump china 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 efficiency is stable and lengthy service time. zero-maintenance cost
Applications:
They’re trusted 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 greatly reducing the bearing cavity and gear cavity oil emulsification. Hence, roots vacuum pump is more suitable for pumping large levels of water vapor and solvent with water ring vacuum pump.