Reduced flow when outlet valve of pump higher than 50% open
Reduced flow when outlet valve of pump higher than 50% open
(OP)
Need your guys expertise...
Had a water stripping pump. We had problem with water in our tank thus we tried to strip as much as possible. However, whenever the valve opening of the pump higher than 50%, the there will be reduced flow..trying to figure out why...
Had a water stripping pump. We had problem with water in our tank thus we tried to strip as much as possible. However, whenever the valve opening of the pump higher than 50%, the there will be reduced flow..trying to figure out why...





RE: Reduced flow when outlet valve of pump higher than 50% open
Possibly: the higher flow is drawing down suction pressure and entering cavitation range. Do you have any indication of cavitation?
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"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Reduced flow when outlet valve of pump higher than 50% open
RE: Reduced flow when outlet valve of pump higher than 50% open
**********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Reduced flow when outlet valve of pump higher than 50% open
I think Biginch has a point.
If you are able to find the pumping curves for the pump you are using you may find that you have insufficient head at the supply to keep up with the pumping delivery I.E. the water can't get through to the pump fast enough with the valve open beyond half way, the pressure falls away and you get less flow and maybe cavitation which will create pitting in your impeller and sound lousy during running Try to find out whay the Net positive suction head is meant to be (google this) calculate your net positive suction head and you may find that you need to either drop the pump/ raise the delivery tank or make the delivery pipework larger and take out any bends in the delivery line.
RE: Reduced flow when outlet valve of pump higher than 50% open
RE: Reduced flow when outlet valve of pump higher than 50% open
RE: Reduced flow when outlet valve of pump higher than 50% open
**********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Reduced flow when outlet valve of pump higher than 50% open
RE: Reduced flow when outlet valve of pump higher than 50% open
**********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Reduced flow when outlet valve of pump higher than 50% open
RE: Reduced flow when outlet valve of pump higher than 50% open