The vacuum pump always class a lot , the industrial most used is the water ring vacuum pumps and rotary vane vacuum pump.
According to the principle of work is divided into: gas pumping pump and gas trapping two kind of pump
The gas pumping pump include: water ring vacuum pump (liquid ring vacuum pump);Rotary vane vacuum pump.fixed vane rotary vacuum pump;Dry vacuum pump;Reciprocating vacuum pump;The roots vacuum pump.Rotary piston vacuum pump;Trochoid vacuum pump;Molecular pump;Traction molecular pump;Composite vacuum pump;Water jet vacuum pump;Gas injection pump;Steam jet pump;Diffusion pump, etc.;
According to the vacuum degree can be divided into: rough vacuum, high vacuum, ultra high vacuum three categories.
Low, rough vacuum pump series, including 2BE water ring vacuum pump, 2SK water ring vacuum pump, SK water ring vacuum pump, SZ water ring vacuum pump, SZB water ring vacuum pump, reciprocating vacuum pump, oil-free vacuum pump, etc.Water ring vacuum pumps are mainly used for pumping air and the other has a certain corrosive, insoluble in water, and allow gases contain a small amount of solid particles.Widely used in food, textile, pharmaceutical, chemical and other industries of vacuum evaporation, concentration, dipping, drying process etc.
Oil-free vacuum pump because of the sealing device used to realize the crankcase and cylinder is completely isolated;Combined with piston ring use self-lubricating materials, achieve the advanced oil free.Because no sewage discharge, the type of vacuum pump particularly applicable to chemical, pharmaceutical and food industries such as vacuum distillation, vacuum evaporation, vacuum drying, vacuum concentration, vacuum impregnation process.
High and ultra-high vacuum pump series including rotary piston vacuum pumps, rotary vane vacuum pump, roots vacuum pump, roots rotary vane pump unit with water ring type and etc.Rotary piston vacuum pump can be used alone, also can be used as the roots vacuum pump, oil pump, oil diffusion vacuum pump pump before use.When the suction on black metal corrosion, the vacuum oil chemical reaction, containing a large amount of steam, gas, the amounts of dust need additional device.Widely used in vacuum crystal pulling, vacuum coating, vacuum metallurgy, vacuum heat treatment, vacuum impregnation, vacuum drying, vacuum distillation, vacuum pug, aerospace simulation test such as new materials, new technology, new technology in the production and development;Rotary vane vacuum pumps used for pumping airtight container gas of one of the basic equipment.It can be used alone, also can be used as booster pump, diffusion pump, molecular pump pump before use.This type of pump is widely used in metallurgy, machinery, electronics, chemical industry, petroleum, pharmaceutical and other industries of vacuum metallurgy, vacuum coating, vacuum heat-treatment, vacuum drying processes etc;Roots water ring vacuum pump unit with water ring vacuum pump as the backing pump, and contains a lot of water vapor and especially suitable for the suction as well as a certain process of corrosive and condensable gases.