Increase flow and pressure??
Increase flow and pressure??
(OP)
How can you increase flow and discharge pressure on a multi-stage vertical pump while holding the suction pressure constant?
We have this exact scenario happening and the flow is measured downstream of the check valve and the pressure is measure upstream of the check valve? Any input is appreciated. Thanks
We have this exact scenario happening and the flow is measured downstream of the check valve and the pressure is measure upstream of the check valve? Any input is appreciated. Thanks





RE: Increase flow and pressure??
(You are not attempting to increase flow and pressure which is what your question appears to ask)
Air binding is a possibility - air in the riser pipe will restrict flow - as the air is entrained and transported downstream you will see an increase in discharge pressure downstream of the air pocket and a corresponding increase in flow.
Solutions are an air valve at the top of the riser and a foot valve on the pump:
RE: Increase flow and pressure??
RE: Increase flow and pressure??
RE: Increase flow and pressure??
RE: Increase flow and pressure??
On drooping pump characteristic curves see:
thread407-108195: Drooping head pump head curve
thread407-108876: Droop Instability
thread407-101056: Pump Curve Has a Maximum Head
RE: Increase flow and pressure??
Mark Hutton
RE: Increase flow and pressure??
In short it is pretty rare for something to go "wrong" that increases the performance of a pump.
David