Reciprocating compressor

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Reciprocating compressor function

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A motor-driven six-cylinder reciprocating compressor that can operate with two, four or six cylinders.

A reciprocating compressor or piston compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure.

The intake gas enters the suction manifold, then flows into the compression cylinder where it gets compressed by a piston driven in a reciprocating motion via a crankshaft, and is then discharged. Applications include oil refineries, gas pipelines, chemical plants, natural gas processing plants and refrigeration plants. One specialty application is the blowing of plastic bottles made of Polyethylene Terephthalate (PET).

Portable compressors

Reciprocating compressors were formerly used for powering portable tools such as pneumatic drills. The unit was mounted on a trailer or a lorry and comprised a reciprocating compressor driven, through a centrifugal clutch, by a diesel engine. The engine's governor provided only two speeds:

• idling, when the clutch was disengaged
• maximum, when the clutch was engaged and the compressor was running

Modern versions use rotary compressors and have more sophisticated variable governors.

See also

• Centrifugal compressor
• Vapor-compression refrigeration
• Diving air compressor

External links

• Calculation of required cylinder compression for a multistage reciprocating compressorar:ضاغط متردد