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When two centrifugal pumps are connected in series the discharge changes by factor of?

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February 29, 2012 4:05PM

Centrifugal pumps in series are used to overcome larger system head loss than one pump can handle alone.

  • for two identical pumps in series the head will be twice the head of a single pump at the same flow rate - as indicated in point 2.

With a constant flowrate the combined head moves from 1 to 2.

Note! In practice the combined head and flow rate moves along the system curve to point 3.

  • point 3 is where the system operates with both pumps running
  • point 1 is where the system operates with one pump running

Series operation of single stage pumps is seldom encountered - more often multistage centrifugal pumps are used.

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