For many years at this point Roots vacuum pumps have already been well established in the area of vacuum technology. In combination 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 low inlet pressure with high ultimate vacuum. Since the pump operating parts have no contact, such as for 
example rotors and the finish 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 gadget manufacturing industries.
In view of the chemical substance, pharmaceutical and various other industries require huge vapor degassing capablity. the sealing structure of roots vacuum pump chamber and the bearing chamber provides improved, which significantly reducing the bearing cavity and equipment cavity oil emulsification. Hence, roots vacuum pump is more suitable for pumping large levels of drinking water vapor and solvent with drinking water ring vacuum pump.