Pump school: How does viscosity affect centrifugal pump performance?


How does viscosity affect centrifugal pump performance?


Pump users are sometimes confronted with the problem of applying an existing centrifugal pump to viscous liquids. Published pump performance curves are normally based on liquids with a viscosity of one centistoke (cSt). When this viscosity is increased, the performance of centrifugal pumps is affected in the following ways:

  1. A marked increase in power consumption
  2. Reduction in head
  3. Reduction in capacity.

The resulting impact of viscosity can be:

  • An undersized pump which will not produce the desired flow and/or head; and
  • Overloading of the electric motor.

Article courtesy of Kelair Pumps Australia – When Pump Knowledge Matters.

For more information phone 1300 789 466 or visit www.kelairpumps.com.au.


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