What is priming in centrifugal pump

This is done mainly to avoid dry running of a centrifugal pump.Priming of a centrifugal pump is the process of filling the liquid at the suction pipe and the impeller.It is recommended to prime the centrifugal pump and then only start the pump.What is priming of centrifugal pump?In other words, the pump casing must be filled with liquid before the pump is started, or the pump will not be able to function.

A centrifugal pump priming is done when the passage ways of the pump are filled with the liquid to be pumped.[smartslider3 slider=11] this is especially required when there is a first start up.Not all pumps require priming but mostly do.Priming simply means preparing or getting something ready for operation.The first step in the operation of centrifugal pump is priming, it means removing all the air or gas or vapour from pump portion by filling water in suction pipe, casing and portion of delivery pipe up to delivery valve.

What is difference between centrifugal pump and self priming pump?Fact is that centrifugal pump are not capable of pumping air or vapours.In centrifugal pump ,priming means filling of fluid to be pumped , to the suction pipe , casing and a portion delivery pipe upto delivery valve.In this process the pump is been filled with the liquid being pumped and this liquid forces all the air, gas, or vapor contained in the passage ways of pump to escape out.Afier priming, close the delivery valve and start electric motor to rotate the impeller.