Roots vacuum pump (referred to as: Roots pump) is built with two opposite directions pump synchronous rotation of the rotor Roots vacuum leaf production and supply, between the rotor, the rotor and the pump housing there is a small gap between the walls and do not touch the displacement pumps. Roots vacuum in the oil, chemicals, plastics, pesticides, turbine rotor balancing, aerospace simulation and other devices have been long-running test, so it should be vigorously promoted and applied in the country. But also widely used in petroleum, chemical, metallurgy, textile and other industries. Vacuum accessories for use in vacuum noise control, vacuum muffler. Roots vacuum pumps its structure and working principle and similar Roots blower pump outlets, while working with its suction port is evacuated container or vacuum system main pumping phase. Between this vacuum pump rotor and the rotor, between the rotor and the casing do not touch, the gap is generally 0.1 to 0.8 mm; no oil lubrication. There arc line rotor profile, involute and cycloidal. Involute rotor pump capacity utilization is high, easy to guarantee precision, so multi-rotor profile involute. Roots vacuum pump speed can be up to 3450 ~ 4100 rev / min; pumping rate of 30 to 10,000 liters / sec (1 liter = 10-3 m 3); ultimate vacuum: Single-stage of 6.5 × 10-2 Pa, two-stage for 1 × 10-3 Pa. Roots vacuum pump manufacturers supply, Roots vacuum pumps, Zhucheng East Machinery Co., Ltd. is provided by John Han Machinery Co., Ltd. Zhucheng East. Zhucheng East Han Machinery Co., Ltd. (www.dhlcfj.com) strong, credible, Shandong Weifang fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the East Han Machinery Co., Ltd. Zhucheng and you hand into the brilliant, for a better future!