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11: What is Positive displacement pump? Name different types Positive displacement pump?

Positive displacement pump are those which discharge specific amount & quantity is constant. 

Positive displacement pumps are that which prevents undesirable flow and pumps the fluid within the closed space.

Positive displacement pumps example are: Multistage pumps, Process type pumps, Chemical process pumps, canned motor pumps, Centrifugal pumps, Paper stroke pumps and deep well turbine pumps.


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