Tag Archives for Compressors

Centrifugal Compressors

Similar to multistage centrifugal pumps, centrifugal compressors, as shown in Figure 10-9, use a series of rotating impellers to impart velocity head to the gas. This is then converted to pressure head as the gas is slowed in the compressor … Continue reading

21. September 2009 by Jack
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Helical-Lobe (Screw) Rotary Compressors

Screw compressors are rotary positive displacement machines. Two helical rotors are rotated by a series of timing gears as shown in Figure 10-8 so that gas trapped in the space between them is transported from the suction to the discharge … Continue reading

21. September 2009 by Jack
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Vane-Type Rotary Compressors

Rotary compressors are positive-displacement machines. Figure 10-7 shows a typical vane compressor. The operation is similar to that of a vane pump. A number of vanes, typically from 8 to 20, fit into slots in a rotating shaft. The vanes … Continue reading

21. September 2009 by Jack
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Reciprocating Compressors #3

Low-speed units are typically integral in design as shown in Figure 10-4. “Integral” means that the power cylinders that turn the crank shaft are in the same case (same housing) as the cylinders that do the compressing of the gas. … Continue reading

21. September 2009 by Jack
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Reciprocating Compressors #2

A compressor may have any number of stages. Each stage normally contains a suction scrubber to separate any liquids that carry over or condense in the gas line prior to the compressor cylinder (or case for centrifugal compressors). When gas … Continue reading

21. September 2009 by Jack
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Reciprocating Compressors #1

A reciprocating compressor is a positive-displacement machine in which the compressing and displacing element is a piston moving linearly within a cylinder. Figure 10-1 shows the action of a reciprocating compressor. In Position 1 the piston is moving away from … Continue reading

21. September 2009 by Jack
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Gas Production Facility – Compressors

Compressors are used whenever it is necessary to flow gas from a lower pressure to a higher pressure system. Flash gas from low-pressure vessels used for multistage stabilization of liquids, oil treating, water treating, etc., often exists at too low … Continue reading

21. September 2009 by Jack
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