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