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
Messages
1
Reaction score
0
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.
 
Physics news on Phys.org
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.
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »
Thread 'Beam on an inclined plane'

Thread 'Beam on an inclined plane'

Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
View full post »

Similar threads

How to maintain flowrate and pressure head in a pump?
Replies
38
Views
4K
How to select a pump for a venturi injector?
Replies
8
Views
3K
Is a Venturi Suction the Solution for Low Pressure in a Centrifugal Pump System?
Replies
2
Views
2K
Calibrating Pump/Venturi (Air) in a Closed Recirculating Water System
Replies
1
Views
311
How to calculate a pump's operating point for a fully open control valve
Replies
3
Views
3K
Pumping fluid against a centrifugal force
Replies
1
Views
3K
How can Bernoulli's principle help explain pressure changes in fluid dynamics?
Replies
6
Views
2K
Pressure of water exiting a hole in PVC
Replies
12
Views
3K
Controlling (liquid) flow and pressure at very low flow rates
Replies
7
Views
2K
Calculate pressure of pumped liquid
Replies
12
Views
3K

Hot Threads

Recent Insights

Back
Top