An air compressor is a device used to compress gas. The air compressor is similar in construction to the water pump. The air compressors commonly used are reciprocating piston, rotary vane or rotary screw types.

There are many types of air compressors.
▪ According to the working principle, air compressors can be divided into two categories: speed type and volume type.
Velocity type: There are mainly two basic types, centrifugal type and axial flow type.
The volume type is divided into rotary type and reciprocating type. Rotary type includes rotor type, screw type (screw air compressors), sliding vane type ( rotary vane air compressors). Reciprocating type contains piston type (piston air compressors), membrane type.

▪ According to the lubrication method, there are oil-free air compressors (oil-less air compressors) and oil-lubricated air compressors.
▪ According to performance, it can be divided into: low noise, variable frequency, explosion-proof and other air compressors.

Air compressors can be widely used in: rock drills, vehicle braking, tire inflation, painting, etc.

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