It is a device which compresses the gases to higher pressure and than this high pressure gas is used for various application like tyre inflation, powering a turbine or used to do some mechanical work. The air compressor is generally powered by electric motor, diesel or gas engine.

Types of Air Compressor
According to the pressure delivered
1. low-Pressure Air Compressors (LPACs): It can discharge pressure at 151 psi or less.
2. Medium-Pressure Air Compressors : Can discharge pressure in between 151 psi to 1000 psi.
3. High-Pressure Air Compressors (HPACs): having discharge pressure above 1000 psi.