The principle and structure Roots vacuum pump is mainly composed of a pair of high-speed synchronous rotation of the "8" shaped rotor and two semicircular pump chamber components. The pump alone can not exhaust, must be with a pump (such as claw-type pumps, screw pumps, rotary piston pump, water pump, oil ring pumps, etc.) used in tandem. Front air intakes on the front-stage pumps in series Roots vacuum pump unit and increase the degree of vacuum before the pump, the effective range can greatly improve the pumping rate. Roots vacuum pump ultimate pressure is determined by the pre-pump. Roots pumps are widely used in vacuum casting, vacuum distillation vacuum melting, vacuum degassing, vacuum coating industry and the chemical and pharmaceutical industry, vacuum drying. Pump is not sensitive to small amounts of dust. Roots vacuum pump is characterized by: Start fast Roots vacuum pump, where there is less power consumption Roots vacuum pump, operation and maintenance costs low, pumping speed, high efficiency, has been pumping gas contained small amounts of water vapor and dust, where the insensitive Roots vacuum pump the cheapest in the range of 100 to 1 Pa pressure greater pumping rate can quickly rule out a sudden release of gas. This happens in the pressure range between oil seal mechanical pump and diffusion pump. Therefore, it is often connected in series between the diffusion pump and mechanical seal pumps, used to increase the range of the intermediate pressure exhaust volume. In this case it is called a mechanical booster pump. Roots vacuum where the best Zhucheng East Han Machinery Co., Ltd., Jinan Roots vacuum provided by Han Machinery Co., Ltd. Zhucheng East. 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.