Negative pressure head
Negative pressure head
(OP)
Can somebody explain to me what negative pressure head means for a centrifugal pump? I had to design a centrifugal pump to increase the flow rate in a gravity feed slurry line, and ended up with a pump that must develop a total pressure head of -12 m.





RE: Negative pressure head
It is possible the assumptions you have used in your model don't match reality. Is any part of the pipe flowing part full?
Can you give us a more detailed description of how you came to this conclusion? A description of the system would also help (static elevations, pipe lengths, operating philosophy etc).
Once we do a "quick and dirty" HGL I'm sure it will be crystal clear!
Cheers
Aussie Mike