Community,
I have a question to help me with my understanding of fluids and centrifugal pumping.
Let say I have a centrifugal pump, with the dead head pressure of 3 bar(g). I have installed an isolation valve 2 meters downstream of the pump outlet. The piping between the pump and the valve is horizontal. The fluid being pumped is water, at STP.
The pump is on 100 % motor speed. I slowly close the isolation valve until fully closed.
Since the fluid is incompressible, and there is no head, what is the pressure in the pipe between the pump and the valve?
What I can't get my head around, is how can a stagnant, incompressible fluid be at 3 bar(g)?