Gas Compressor

Definition - What does Gas Compressor mean?

A Gas Compressor is a mechanical device which is used extensively in the Natural Gas transportation through pipelines by any natural gas marketing organization. This device is used to compress the volume of the natural gas thereby increasing its pressure. This enables the natural gas to easily flow to long distances within the large trunk pipelines without any drop in pressure.

Petropedia explains Gas Compressor

A Gas Compressor can be related to a pump; however, the difference between both is that the compressor compresses the volume of the material to be transported in a pipeline and it moves itself because of high pressure being generated, whereas a pump just pushes the material to move forward. Since liquids are not compressible, the oil and gas industry does not use compressors for transportation of crude oil or petroleum products in a pipeline. It uses pumps. But since natural gas can be compressed to great extent, gas compressors are used to transport this pressurized natural gas

There are two types of gas compressors, i.e., Positive Displacement type gas compressor and Dynamic type gas compressor.

Positive Displacement type gas compressors are further divided into two categories:

  • Rotary Type – Examples are Lobe, screw, liquid ring, scroll and vane type gas compressors
  • Reciprocating type – Examples are Diaphragm, Double Acting and Single Acting gas compressor

Similarly, Dynamic type gas compressors are also further divided into two categories, i.e., Centrifugal Gas compressors and Axial Flow gas compressors.

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