Differences between centrifugal pumps and positive displacement pumps


Special features and characteristics of centrifugal pumps

The centrifugal pump is the most common type and is used for generally pumping liquids.  They are always rotating and transform the mechanical energy of an impeller into kinetic or pressure energy of an incompressible fluid.

The centrifugal action inside the pump volute increases the pressure. This is when the treated fluid experiences great speed variations and, in turn, the cutting action affects the molecular structure of the fluid. These pumps are designed with motors that operate at high revolutions.

Types of centrifugal pumps from FlowMIM

  • Simple Centrifugal Pump
  • Industrial Centrifugal Pump
  • Centrifugal Food/Sanitary Pump
  • Hygienic Centrifugal Pump
  • Centrifugal pump with helical impeller

To find out which pump is best suited to your company’s requirements, just contact AGITIM, which is FlowMIM’s department that specialises in designing customised pumping systems.


Positive displacement pumps

In this case, the main difference is that the pressure increase is carried out by the thrust of the chamber walls, which leads to fluid volume variations, thus causing its displacement by hydrostatic principle. In other words, they pump a defined volume, but almost independently of the pressure.  We are dealing with a pump that is specially designed to handle a large number of pumping tasks. They usually work with geared motors that operate at low speeds in order to prolong the lifespan of the driving elements, such as the rotor, impeller, gears, lobes, …

Tell us what you need, and we will analyse your requirements carefully

If you are not sure what type of pumping system you need, you can visit our previous post, or contact InoxMIM. Remember that we have been designing customised pumping systems for many years; we strive to meet the industrial needs of each and every one of our customers. We hope we have helped you by highlighting the differences between centrifugal pumps and positive displacement pumps.

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