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Self priming = (NPSHR=0)? 1

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shahyar

Chemical
Joined
Feb 15, 2005
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216
Location
CA
Hi,
Does self priming mean required NPSH of a pump is zero?

Thanks for replies
 

If only it did, it would make life so much easier for the pump world, however, NPSHa or NPSHr is a function of atmospheric pressure, inlet/impeller design and pump installation configuration so therefore doesn't change.

The self priming feature is only there to evacuate air on the inlet side so the pump will "prime" or to handle any air entrained in the incoming flow.
 
only if you are pumping vapour!
 
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