I would like to know general practice for minimum flowrate of centrifugal pumps.
(Assume. rated capacity 50m3/hr/pump, minimum flow 10 m3/hr/pump)
Case1) Using a restriction orifice for minimum flow line.
1-1) 2 working, 1 stand-by pumps
1-2) 3 working, 1 stand-by pumps
Case2) Using a flow control valve for minimum flow line.
2-1) 2 working, 1 stand-by pumps
2-2) 3 working, 1 stand-by pumps
And all pumps are installed in common suction line and discharge line.
What is the flowrate of a restriction orifice and a control valve for each case?
Edited by prengr, 22 March 2012 - 05:33 AM.