Classifications of the Pumps

Question

What are the several classifications of the pumps?

Answer 1

Pumps are classified into:

a) Positive displacement pumps and
b) Rotodynamic pumps.

In Positive Displacement Pumps the fluid is drawn or forced into a finite space and then sealed by mechanical means. The fluid is then forced out to a higher level.
Example: Reciprocating pump

In Rotodynamic Pumps there is a free passage between the inlet and outlet without any intermittent sealing.
Example: Centrifugal pump