Roots pumping its structure and works with blower similar work its intake port and being evacuated container or vacuum system main pumping phase. Between this vacuum pump rotor and the rotor, between the rotor and the casing does not contact each other, a gap is generally 0.1 to 0.8 mm; no oil lubrication. There arc line rotor profile, involute and cycloid like. Involute rotor pump capacity utilization is high, easy to guarantee precision, it is multi-rotor profile involute. Roots vacuum pump speed can be as high as 3450 ~ 4100 rev / min; pumping rate of 30 to 10,000 liters / sec (1 liter = 10-3 m3); ultimate vacuum: Single-stage is 6.5 × 10-2 Pa, two-stage to 1 × 10-3 Pa. Roots vacuum pump structural characteristics: 1, in a wide pressure range has a higher pumping speed; 2, the rotor has a good geometrical symmetry Roots vacuum pump manufacturer, so little vibration, smooth operation and between the rotor and the rotor. Roots vacuum gap between the casing are, no lubrication, low friction losses, it can greatly reduce the driving power, enabling high speed; 3, the pump chamber without sealing and lubrication oil, can reduce oil vapor vacuum system pollution; 4, uncompressed Roots vacuum pump chamber use, no exhaust valve structure is simple, compact, and has been pumping gas for dust and water vapor insensitive; 5, Roots vacuum pumps at home and abroad in recent years been more rapid development in the metallurgical, petrochemical, electrical, electronics and other industries has been widely used. Roots vacuum lifting and transportation Note 1. Roots vacuum machine lifting methods should be appropriate. 2. lifting capacity spreader and lifting equipment to adapt to the weight of the vacuum pump. 3. spreader to be long enough that the spreader angle is less than 90 degrees. 4. Select the appropriate lifting points. 5. Place the spreader must be correct in order to ensure smooth lifting. 6. Check the integrity of the spreader. 7. Make sure the lifting capacity of lifting equipment! Roots vacuum pump manufacturers, wholesale _ _ Zhucheng East Han Machinery Co., Haikou Roots vacuum provided by the Eastern Han Machinery Co., Ltd. Zhucheng. Zhucheng East Han Machinery Co., Ltd. (www.dhlcfj.com) (www.dhlcfj.com) is an industry leader in Shandong Weifang, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. John in Zhucheng East Machinery Co., Ltd. leadership with the staff warmly welcome all inquiries negotiations to create Zhucheng East Han Machinery Co., Ltd. a better future.