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[N243]

Hi everyone,

 

I have a peculiar situation which I am facing currently and hoping experienced people here can assist me.

 

I am evaluating a flooded-suction type firefighting pump proposal in which the vendor has declined to mention the actual NPSHr required.

 

Upon enquiry, their response can be boiled down to "It is FM/UL Certified and hence, the NPSHr is meeting FM/UL Guideline." 

 

I dug deeper and found out that FM refers to NFPA 20 for sizing/guideline but nothing has been mentioned regarding NPSH for a centrifugal diesel-driven engine pump.

 

Has anyone here faced a similar situation and is NPSHr not mentioned for FM/UL certified pumps?

 

-N243