Reciprocating Compressors – Piston Displacement

 
By 8 November 2016
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The actual volume of the cylinder that is swept by the piston per minute is piston displacement. It can be calculated from:
Single acting cylinder (head end displacement)

cal-11-4

Single acting cylinder (crank end displacement)

cal-11-5

Double acting cylinder (sum of head end and crank end displacement)

cal-11-6

Throughput can be changed directly by changing the piston displacement. This can be accomplished by changing the speed, by removing or deactivating suction valves, or by converting a double acting cylinder to single acting.

In addition, piston displacement and thus throughput can be changed by changing cylinder liners, installing sleeves, or boring the cylinder.

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