Pumps, Compressors, Blowers and Fans

Comparing pumps, compressors, blowers and fans

A generic definition of a Pump is

"A machine or device for raising, compressing, or transferring fluids."

In practice - it is common to differentiate between

  • pumps
  • compressors
  • blowers
  • fans

as summarized below:


  • A pump is a machine for raising a liquid - a relatively incompressible fluid - to a higher level of pressure or head.


  • A compressor is a machine for raising a gas - a compressible fluid - to a higher level of pressure.


  • A blower is a machine for moving volumes of a gas with moderate increase of pressure.


  • A fan moves large amounts of gas with low increase in pressure.

Related Topics

  • Fluid Mechanics - The study of fluids - liquids and gases. Involves various properties of the fluid, such as velocity, pressure, density and temperature, as functions of space and time.
  • Gas and Compressed Air - Gas properties, capacities of pipelines, sizing of relief valves - air, LNG, LPG and more
  • Pumps - Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more
  • Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more

Related Documents

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