![]() Positive-displacement compressors can be further broken out into reciprocating types, where the piston style predominates, and rotary types such as the helical screw and rotary vane. They can range in size from the fits-in-a-glovebox unit that inflates tires to the giant reciprocating or turbocompressor machines found in pipeline service. As with pumps, compressors are divided into centrifugal (or dynamic or kinetic) and positive-displacement types but where pumps are predominately represented by centrifugal varieties, compressors are more often of the positive- displacement type. ![]() Compressors are used throughout industry to provide shop or instrument air to power air tools, paint sprayers, and abrasive blast equipment to phase shift refrigerants for air conditioning and refrigeration to propel gas through pipelines etc. Compressors are mechanical devices used to increase pressure in a variety of compressible fluids, or gases, the most common of these being air.
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