Measuring pressure across a centrifugal pump

[djohnson83]

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.

 

[Jobrag]

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.