Air compressor

It is an application of a gas compressor and a pneumatic device that converts mechanical power (from an electric motor, diesel or gasoline engine, etc.)

When the delivery pressure reaches its set upper limit, the compressor is shut off, or the excess air is released through an overpressure valve.

[1] The pressure energy provided by the compressed air can be used for a variety of applications such as pneumatic tools as it is released.

Compressors may be classified according to the pressure delivered: There are numerous methods of air compression, divided into either positive-displacement or roto-dynamic types.

[5] Common types of positive displacement compressors are The capacities for both single-stage and two-stage compressors are generally specified in Standard Cubic feet per Minute (SCFM) or litres per minute and pounds per square Inch (PSI) or bar.

[citation needed][clarification needed] Roto-dynamic air compressors include centrifugal compressors where Rotating vanes impart kinetic energy to a gas and stationary passages convert velocity into a rise in pressure, and axial compressors, where rotor blades impart the kinetic energy and stator blades convert it to a rise in pressure.

While direct drive gasoline or diesel-engines and electric motors are among the most popular, air compressors that utilize vehicle engines, power-take-off, or hydraulic ports are also commonly used in mobile applications.

[9] The power of a compressor is measured in HP (horsepower) and CFM (cubic feet per minute of intake air).

[11] According to CAGI air compressor performance verification data sheets, the higher the isentropic efficiency is, the better the energy saving is.