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Sudden increase of flow at PD pump inlet

Sudden increase of flow at PD pump inlet

Sudden increase of flow at PD pump inlet

Hey guys,

I am studying a system which has a PRV at the discharge of a positive displacement pump.
The discharge of the PRV is sent back to the suction line of the pump.
The pump has no control whatsoever.
I was wondering, if the PRV relieves flow to the suction while the pump keeps receiving flow from the main source,
there will be a sudden increase of flow to the pump.
What will happen to the head and other pump parameters?

Thanks in advance!

RE: Sudden increase of flow at PD pump inlet

A positive displacement pump, by definition, controls the flow rate through the pump. It is the other flows that change.

RE: Sudden increase of flow at PD pump inlet

I think you are talking about the release valve (RV) on the positive displacement pump. When the head pressure on the discharge side increases the release valve will increase as well, which is designed to protect the piping network and the pump itself. If you want to reduce the flow rate through the release valve. Most release valve's have an adjustment, which you can force more of the product through at a higher operating pressure.


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