The actual capacity of an air or gas compressor is the quantity of air or gas compressed and delivered. It is usually expressed in cubic feet per minute (CFM) at intake pressure and temperature. Standard cubic feet per minute (SCFM) is delivered air at specified laboratory conditions

is the existing gauge pressure plus atmospheric pressure. At sea level the gauge pressure in pounds per square inch (PSI) plus 14.7 gives the absolute pressure in pounds per square inch (PSIA).

Are devices for removing the heat of compression of the air or gas after compression is completed. They are one of the most effective means of removing moisture from compressed air.

Are tanks into which the compressed air or gas is discharged from the compressor. Receivers help to eliminate pulsations in the discharge line and also act as storage capacity during intervals when the demand exceeds the capacity of the compressor. Use proper size tank as furnished and/or recommended by manufacturer. Do not reduce tank size or rest [..]

Booster compressors are machines for compressing air or gas from an initial pressure, which is above atmospheric pressure, to a still higher pressure.

is free air that has been pressed into a volume smaller than it normally occupies. As compressed air exerts pressure, it performs work when released and allowed to expand to its normal free state.

is the ratio of the theoretical horsepower to the actual indicated horsepower required to compress a definite amount of gas.

are machines designed for compressing air or gas from an initial intake pressure to a higher discharge pressure

is the volume swept through by the piston. This is usually expressed in cubic feet per minute.

is that of the first stage only, since the same gas passes through all stages in series.