Hydrotesting of centrifugal pump.
Hydrotesting of centrifugal pump.
(OP)
Hello Everybody,
I am associated with new pump manufacturer. For me, it is understood that hydrotesting is required to generate (centrifugal) Pump curve and NPSHR calculation. Will you please tell me which factors should be consider during hydrotesting of pump? like tests the pump with water at different capacities,....and seeking guidance about plotting Pump curve, System Curve, BEP from Hydrotest of pump....
I am associated with new pump manufacturer. For me, it is understood that hydrotesting is required to generate (centrifugal) Pump curve and NPSHR calculation. Will you please tell me which factors should be consider during hydrotesting of pump? like tests the pump with water at different capacities,....and seeking guidance about plotting Pump curve, System Curve, BEP from Hydrotest of pump....





RE: Hydrotesting of centrifugal pump.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Hydrotesting of centrifugal pump.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Hydrotesting of centrifugal pump.
You are referring to 'performance testing'.
Obivously, you will want to measure and record the suction and discharge pressures, liquid temperature and properties, rotating speed, and motor loads to generate a proper performance curve.
There are different ways to verify NPSHr, doing a google search will find some of them.
RE: Hydrotesting of centrifugal pump.
rmw
RE: Hydrotesting of centrifugal pump.
Let your acquaintances be many, but your advisors one in a thousand' ... Book of Ecclesiasticus
RE: Hydrotesting of centrifugal pump.
RE: Hydrotesting of centrifugal pump.
RE: Hydrotesting of centrifugal pump.
RE: Hydrotesting of centrifugal pump.
RE: Hydrotesting of centrifugal pump.
RE: Hydrotesting of centrifugal pump.
I have my HI hard copy in the office and I'm on site at the moment. I'll be back in 2-3 weeks and take a look to answer your question.
For the moment I can recall that 2 grades are defined in ISO 9906, grade 1 & 2 where grade 1 has restricted tolerances (+-4.5% for flow, +-3 for head & -3 for efficiency) for H & Q. NPSH is based on NPSH3 and different uncertainties are defined in percentage. I hope that this would give a glue for your comparison.
Good luck.
RE: Hydrotesting of centrifugal pump.
RE: Hydrotesting of centrifugal pump.
IEC is to NEMA for the electric motor standard.
ISO 9906 is for rotodynamic ( centrifugal, mixed flow and axial flow) pumps.
While HI has different sub-standards for different types of pumps.
ISO and IEC are used by European manufacturers and user.