NPSH
NPSH
(OP)
Dear All,
We are installing a vertical turbine fire pump as NFPA 20 and we are providing the required submergence as required by NFPA 20.
We know that NPSH is an important consideration in pump selection.
I did not provide vendor NPSHa and neither I asked vendor about NPSHr.
I was told that NPSH is not applicable to fire pumps as long as we provide the required submergence.
Do I need to specify the pump NPSHa and compare it with NPSHr from Vendor? Did I make a mistake by following this ?
Please provide your comments.
Please advise where does NFPA 20 talk about NPSH for vertical turbine pumps?
Thanks
We are installing a vertical turbine fire pump as NFPA 20 and we are providing the required submergence as required by NFPA 20.
We know that NPSH is an important consideration in pump selection.
I did not provide vendor NPSHa and neither I asked vendor about NPSHr.
I was told that NPSH is not applicable to fire pumps as long as we provide the required submergence.
Do I need to specify the pump NPSHa and compare it with NPSHr from Vendor? Did I make a mistake by following this ?
Please provide your comments.
Please advise where does NFPA 20 talk about NPSH for vertical turbine pumps?
Thanks





RE: NPSH
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: NPSH
rmw
RE: NPSH
Again, sump design and correct installation is paramount for trouble free operation.
RE: NPSH
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: NPSH
Johnny Pellin
RE: NPSH