Roots vacuum pumps its structure and working principle and blower similar work with its suction port is evacuated container or vacuum system main pumping phase. Between this vacuum pump rotor and the rotor do not make contact between the rotor and the casing offer Roots vacuum gap is generally 0.1 to 0.8 mm; no oil lubrication. There arc line rotor profile, involute and cycloidal. Involute rotor pump Roots vacuum utilization of high volume direct, 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 vacuum pump is 6.5 × 10-2 Pa Luoci Where is the best, dual-stage for 1 × 10-3 Pa. Gas-cooled Roots pumping main structure: Bearings: a fixed axis uses double row angular contact ball bearings, telescoping end uses roller bearings with high load capacity. These bearings can withstand high speed and load, in order to ensure that the gap between the gear and the rotor between. Seal: Roots pump seal with a two-way internal lip seal, can effectively prevent the flow of fluid two-way mutual, consistent fluid composition. Drive shaft seal using the oil seal. Roots vacuum pump manufacturers, wholesale | Roots vacuum | Zhucheng East Han Machinery Co., Ltd. is provided by the East Han Machinery Co., Ltd. Zhucheng. 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!