For many years 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 high 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 finish cover, therefore the pump efficiency is stable and long 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.
In view of the chemical substance, pharmaceutical and other industries require large vapor degassing capablity. the sealing framework of roots vacuum 
pump chamber and the bearing chamber offers improved, which greatly reducing the bearing cavity and equipment cavity oil emulsification. Therefore, roots vacuum pump is more suitable for pumping large quantities of water vapor and solvent with drinking water ring vacuum pump.