With the development of vacuum application, the type of vacuum pump has developed many kinds, and its pumping speed has risen from the zero point of the second to hundreds of thousands, millions of litres per second.

With vacuum technology in the field of production and scientific research to the requirements of the application scope of the pressure is more and more wide, mostly need consists of several common after extraction of vacuum pump vacuum extraction system can meet the requirements of production and scientific research process, because the vacuum application department involved in the work pressure range is very wide, so any one type of vacuum pump could not fully apply to all working pressure range, can only work according to the different pressure range and different work requirements, using different types of vacuum pump.

In order to use the convenience and various vacuum process needs, various vacuum pumps are sometimes combined with their performance requirements to be used in unit type.

Commonly used include dry screw vacuum pump, vacuum pump water ring pump, reciprocating pump, plunger pump, rotary vane pump, roots pump and diffusion pump, the pump is the national economy industry application is indispensable in the process of vacuum process of main pump.

In recent years, with the rapid growth of economy in our country, vacuum pump maintaining the momentum of rapid growth, the downstream application field in vacuum pump applications continue to expand at the same time under the pull factors such as, the vacuum pump industry in our country to realize the continuous steady rapid growth.