![]() Put another way, a positive displacement compressor is one that operates by drawing in a discrete volume of gas from its inlet then forcing that gas to exit via the compressor's outlet. The main and important types of gas compressors are illustrated and discussed below:Ī positive displacement compressor is a system that compresses the air by the displacement of a mechanical linkage reducing the volume (since the reduction in volume due to a piston in thermodynamics is considered as positive displacement of the piston). Each stage further compresses the gas and increases its pressure and also temperature (if inter cooling between stages is not used). Often, the second stage is physically smaller than the primary stage, to accommodate the already compressed gas without reducing its pressure. Many compressors can be staged, that is, the fluid is compressed several times in steps or stages, to increase discharge pressure. ![]() The main action of a pump is to pressurize and transport liquids. Gases are compressible, while liquids are relatively incompressible, so compressors are rarely used for liquids. The main distinction is that the focus of a compressor is to change the density or volume of the fluid, which is mostly only achievable on gases. An air compressor is a specific type of gas compressor.Ĭompressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. A small stationary high pressure breathing air compressor for filling scuba cylinders High pressure reciprocating compressor from Belliss and Morcom, used in the bottling industryĪ compressor is a mechanical device that increases the pressure of a gas by reducing its volume. ![]() For other uses, see Compressor (disambiguation).
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