Use Features: ZJP Roots vacuum pump has a large pumping speed at low inlet pressure, and have automatic anti-overload function. However, since the structure of this type of pump are dry-type gap seals, in order to obtain a certain degree of vacuum pumping speed and reduce regurgitation, it must be reduced Roots vacuum foreline pressure, so there must be pre-series with the use of a vacuum pump, foreline pump pumped certain degree of vacuum, and then start the Roots pump, this is more cost-effective, according to actual needs, can choose different vacuum pump as a backing pump, such as oil seal pumps, liquid ring pumps. It is worth mentioning that the Roots pump where the best, when elected by a liquid ring pump as a backing pump Roots vacuum outlets, particularly the need for a large number of pumping condensable gas. Roots vacuum pump Installation Notes 1. The main pump must operate within its optimum operating range; 2. the main pump or intermediate pump with a pump of its compression ratio must not exceed the allowable range; 3. forepump first stage Luo Mainz pump ratio as small as possible, the current decline in pump performance, vacuum performance of the system will not have a major impact Roots vacuum where the cheapest | Roots pumping | Zhucheng East Han Machinery Co., Ltd. from Zhucheng East Han Machinery Limited. Zhucheng East Han Machinery Co., Ltd. (www.dhlcfj.com) (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 Zhucheng East Han Machinery Co., Ltd. into the brilliant and you work for a better future!