Atlas copco Compressor Pdf

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What is a Compressor?

• A Compressor is a Mechanical Device which sucks in air or a gas at a lower pressure and delivers it at a higher pressure.

The performance of a compressor is measured by following parameters

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Capacity in volume per unit time referred as Free Air Delivery( FAD) . Free air delivery is the volume of air per unit time measured at discharge referred to suction conditions of temperature and pressure

Pressure:

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• This is the pressure of air delivered by a compressor at the discharge . Pressure can be measured as Kg/Sq cm, psi etc

There are many units of pressure measurement. Some of these and their equivalents are listed below.

1 bar = 100000 N/m2

1 bar = 100 kPa

1 bar = 14.50 psi

1 bar = 10197 kgf/m2

• When we refer to Pressure we should clearly understand the difference between the Absolute Pressure and Gauge Pressure

• Any reference to stated Power should clearly refer to the Pressure at which it is measured.

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