NPSHr for Vertical 3 Stg. Pump
NPSHr for Vertical 3 Stg. Pump
(OP)
Greetings,
I am working on resolving suction problems on a Byron Jackson 3 stg. Vertical Turbine. The datasheets that I have at my disposal include a pump curve without a NPSHr curve. I was referred to other paperwork where the NPSHr was given for the design flowrate. Two values are given: 1)NPSHr @ Impeller Eye=16 ft., & 2)NPSHr @centerline of suction nozzle=-2 ft. The question is which value is the right one to use? From study of the dimensions of the turbine, it is clear that the distance from the suction nozzle to the impeller eye is 18 ft. Any help is appreciated.
I am working on resolving suction problems on a Byron Jackson 3 stg. Vertical Turbine. The datasheets that I have at my disposal include a pump curve without a NPSHr curve. I was referred to other paperwork where the NPSHr was given for the design flowrate. Two values are given: 1)NPSHr @ Impeller Eye=16 ft., & 2)NPSHr @centerline of suction nozzle=-2 ft. The question is which value is the right one to use? From study of the dimensions of the turbine, it is clear that the distance from the suction nozzle to the impeller eye is 18 ft. Any help is appreciated.





RE: NPSHr for Vertical 3 Stg. Pump
RE: NPSHr for Vertical 3 Stg. Pump
Can you give the type and series of the pump? I have some serious BJ technical books and would like to look it up.
rmw
RE: NPSHr for Vertical 3 Stg. Pump
Thanks for the post. The BJ pump is a 2000 VLT 3 stg. turbine. 1200 RPM, 20" HQ-"L" Imp. Vertical Turbine.
I also have a note here that states a minimum submergence of 60". Thanks for the help.
Kyle