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Air is compressed by air compressors. Air compressors draw in air at an inlet valve, they then compress the air to the required volume and release the pressurised air through the discharge valve into a storage tank. The compression process is usually powered by an electric motor.
There are two types of air displacement which a compressed air system may operate upon:
Positive Displacement - The most common compression method, positive displacement compressors force air into a confined space, usually through the movement of a mechanical device.
Dynamic Displacement - Compared to positive displacement compressors which physically reduce the volume of captured air, dynamic displacement compressors speed up the air to high velocity. The energy created from this builds up air pressure.
