Centrifugal pump head 20m, pump shaft power 1.5kw, efficiency 60%, liquid density 998kg/m3, pump flow how to count?
And the thickness of your pipe. Of course, the centrifugal pump is also the difference between the speed.
This has a lot to do with the rotor of the pump, which involves each rotation of the rotor
I learned it at college, and now I can't, alas
