Classification of vacuum pumps
Classification of vacuum pumps
There are many types of vacuum pumps, and the most commonly used in industry are water ring vacuum pumps and rotary vane vacuum pumps.
According to the working principle, they are divided into two types: air extraction pumps and gas capture pumps.
The pumps for the pumped gas include: water ring vacuum pumps (liquid ring vacuum pumps); rotary vane vacuum pumps, fixed vane vacuum pumps; dry vacuum pumps; reciprocating vacuum pumps; roots vacuum pumps; sliding valve vacuum pumps; cycloid vacuum pumps; molecular pumps; traction molecular pumps; compound vacuum pumps; water jet vacuum pumps; gas jet pumps; steam jet pumps; diffusion pumps, etc.;
According to the degree of vacuum, they can be divided into three categories: rough vacuum, high vacuum, and ultra-high vacuum.
The low and rough vacuum pump series include 2BE water ring vacuum pumps, 2SK water ring vacuum pumps, SK water ring vacuum pumps, SZ water ring vacuum pumps, SZB water ring vacuum pumps, reciprocating vacuum pumps, oil-free vacuum pumps, etc. Water ring vacuum pumps are mainly used to extract air and other gases those are corrosive, insoluble in water, and allow a small amount of solid particles. Widely used in vacuum evaporation, concentration, impregnation, drying and other processes in food, textile, pharmaceutical, chemical and other industries.
The oil-free vacuum pump uses a sealing device to achieve complete isolation between the crankcase and the cylinder; in addition, the piston ring uses self-lubricating materials to achieve advanced oil-free. Due to no sewage discharge, those type of vacuum pump is particularly suitable for vacuum distillation, vacuum evaporation, vacuum drying, vacuum concentration, vacuum impregnation and other processes in the chemical, pharmaceutical, food and other industries.
The high and ultra-high vacuum pump series include slide valve vacuum pumps, rotary vane vacuum pumps, Roots vacuum pumps, water ring Roots rotary vane pump units, etc. The slide valve vacuum pump can be used alone or as a fore-stage pump for Roots vacuum pumps, oil pumps, and oil diffusion vacuum pumps. When pumping vacuum media those are corrosive to ferrous metals, chemically react with vacuum oil, and contain a large amount of steam, gas, and a large amount of dust, a device must be installed. they is widely used in the production and development of new materials, new processes and new technologies such as vacuum crystal pulling, vacuum coating, vacuum metallurgy, vacuum heat treatment, vacuum impregnation, vacuum drying, vacuum distillation, vacuum grouting, aerospace simulation tests, etc. The rotary vane vacuum pump is one of the basic equipment used to extract gases from closed containers.they can be used alone or as a fore pump for booster pumps, diffusion pumps and molecular pumps. those type of pump is widely used in vacuum metallurgy, vacuum coating, vacuum heat treatment, vacuum drying processes in metallurgy, machinery, electronics,
