(1) Roots vacuum pump equipment has a large pumping speed in a wide pressure range;

　　(2) The rotor has good geometric symmetry, so the vibration is small and the operation is stable. There are gaps between the rotors and between the rotors and the casing, no lubrication is required, and the friction loss is small, which can greatly reduce the driving power, so that a higher speed can be achieved;

　　(3) There is no need to use oil to seal and lubricate the pump chamber of the Roots vacuum pump equipment, which can reduce the pollution of oil vapor to the vacuum system;

　　(4) There is no compression and no exhaust valve in the pump chamber. Simple and compact structure, insensitive to dust and water vapor in the pumped gas;

　　(5) The compression ratio of Roots vacuum pump equipment is low, and the effect of hydrogen pumping is poor;

　　(6) The rotor surface of the Roots vacuum pump equipment is a curved cylinder with a complex shape, which is difficult to process and inspect. Roots vacuum pump equipment has developed rapidly at home and abroad in recent years. It has been widely used in smelting, petrochemical, electrical, electronics and other industries.

　　The characteristics of Roots vacuum pump equipment are: fast startup, low power consumption, low operation and maintenance costs, high pumping speed, high efficiency, insensitive to a small amount of water vapor and dust contained in the pumped gas, and the pressure range of 100-1 Pa There is a large pumping rate inside, which can quickly remove the suddenly released gas.