What will be the change in discharge pressure and flow rate of a centrifugal pump when pressure at the suction side increases by a certain amount due to change in process conditions? Answers correlating the problem with H-Q curve and system curve will be more convincing for me.
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Re: Discharge pressure, flow rate changes
20 December 2006 at 1:29pmIf the discharge pressure of the system stays the same as the suction pressure increases, then the system curve will drop and thus intersect the pump curve at a high flow rate.
If however, the discharge pressure of the system rises as a result of the suction pressure increase, then the system curve will stay the same and, as the pump curve will also stay the same, there will be no change in capacity.
If the suction pressure is very small in relation to the TDH, then there will be no appreciable difference in the total head from the pump, or the discharge pressure in the sytem.
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