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Centrifugal Pump Centrifugal Pump TypesTypes

Prof. Dr. Eng. Maher HigazyProf. Dr. Eng. Maher Higazy

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Centrifugal Pump Types

As mentioned before, there are three types of pump impellers used for single stage pumps; they are closed, semi-open and open impellers. The double suction impellers are closed type as well as the multi-stage pumps.

Three types of pump impellers

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Different types of blades and impellers

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Different Impellers and Casing for Centrifugal Pump

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(a)In pumps with a single volute, radial hydraulic forces do not balance

(b)In a twin or double-volute pump radial hydraulic forces balance

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The casing may be horizontally or axial split casing or radial split casing.

For multi-stage pumps, the axial split casing is used as in the following figure-HORIZONTALLY SPLIT MULTI-STAGECASING

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10 STAGE CENTRIFUGAL PUMP- with balancing Drum.

Impellers are facing the same direction

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Double suction pump

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Prof. Maher Higazy 10Two-Stage Submersible Lift Pump

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(a) Shallow Well (b) Deep Well

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Axial cross section of a single-stage, single-suction, split-case,

Side-suction, side-discharge centrifugal pump

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Two-stage pump having single-suction impeller facing opposite direction

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Four blade impeller for mixed flow high speed pump

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