pump curves
pump curves
(OP)
I am performing a field test of the pumps at our water treatment facility. While I know it is necessary for the pressure guage to be located between the throttling valve and the pump, is it necessary for the meter to be in the same area as the pressure gauge? The flow does not empty to atmosphere. It is under a constant head of the clarifier.
I ask this because when plant personnel performed a test years ago, they throttled the valve in the intake building where they read the pressure on the guage to get the head before the throttling valve but took the discharge rate by an existing magmeter in our pipe gallery at a point 1000 feet from the intake building (throttling valve point) at a difference of 25' in height. I think their results were skewed but I'm not sure.
I ask this because when plant personnel performed a test years ago, they throttled the valve in the intake building where they read the pressure on the guage to get the head before the throttling valve but took the discharge rate by an existing magmeter in our pipe gallery at a point 1000 feet from the intake building (throttling valve point) at a difference of 25' in height. I think their results were skewed but I'm not sure.





RE: pump curves
flow in your system will be conserved, it will not matter where you record it other that the possibility of interferences from your system on the meters efficiency or if there are flows out of the system prior to the meter.
BobPE
RE: pump curves
1. Were the pressure readings on throttling equal at both
ocassions ?
2. What is the rangeability of the magmeter and its
accuracy at low flow rates ?
3. What difference did both flow rates show ?
4. "Noise" from air bubbles and/or solids in the water
stream may change the magmeter reading, especially after
some years, and it may need recalibration. See:
www.engineeringtoolbox.com/49_530.html
RE: pump curves
Regards checman
RE: pump curves
RE: pump curves
We were looking for degridation, not exact output.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: pump curves
RE: pump curves
your question should be posted as a new thread. simple to accomplish . . .
good luck!
-pmover