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       Vacuum pumps can be pumped by moving gas through a pair of bladed rotors in the pump chamber by synchronous and reverse rotation.

       Roots vacuum pump has been tested for a long time in petroleum, chemical industry, plastics, pesticides, steam turbine rotor dynamic balance, aerospace space simulation and other devices, so it should be vigorously promoted and applied in China. It is also widely used in petroleum, chemical, metallurgical, textile and other industries.

       Roots vacuum pump is characterized by fast start-up, low power consumption, low operation and maintenance costs, high pumping speed and efficiency, insensitive to a small amount of water vapor and dust contained in the pumped gas, large pumping rate in the pressure range of 100-1 Pa, and rapid elimination of sudden gas release.