Measuring pressure across a centrifugal pump

AI Thread Summary
To measure flow rate in a pipe with a centrifugal pump, installing pressure gauges before and after the pump can provide data for flow rate calculations using a look-up table. However, an orifice plate is often necessary between the gauges to obtain accurate differential pressure readings. The head flow curve for the pump is essential, as it allows for the calculation of head based on the differential pressure across the pump. This method enables users to derive flow rates effectively. Accurate measurements depend on proper setup and understanding of the pump's characteristics.
djohnson83
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This should be an easy one but here goes...

I am trying to easily measure flow rate in a pipe which has an in line centrifugal pump (Grundfos UPS 25-60) creating the head in the system. I have been told that installing a pressure gauge before and directly after the pump will give me system flow rate from a look-up table. Is this the case?

My recolection is that you need some kind of orifice plate in the flow and between the two gauges to get a useful reading.
 
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If you have the head flow curve for the pump you can calculate the head from the DP across the pump and from that look up the flow.
 

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