For many years right now 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 plenty of advantages.
Features:
The main benefit of roots vacuum pump is a higher pumping speed at the low inlet pressure with high ultimate vacuum. Because the pump working parts have no contact, such as for example rotors and the end cover, so the pump overall performance is definitely stable and lengthy service time. zero-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 other industries require huge vapor degassing capablity. the sealing framework of roots vacuum pump chamber and the bearing chamber has improved, which significantly reducing the bearing cavity and gear cavity oil emulsification. Thus, roots vacuum pump is certainly more ideal for pumping large quantities of drinking water vapor and solvent with water ring vacuum pump.