Pump flow question
Pump flow question
(OP)
We need to determine the output of a centrifugal pump. The problem is that there are no pressure gauges to determine the dP across the pump, and no flowmeter downstream. The manufacturers pump curve has horsepower included. Is it "acceptable" to determine flow based on motor amperage?
StoshM
StoshM





RE: Pump flow question
RE: Pump flow question
Are there no drain or vent valves that you could install a temporary pressure gauge? That would give you a check against the Hp estimation.
Can you rent a portable ultrasonic flowmeter? I've used these on water lines and they are an excellent tool.
It comes down to how critical is this flow rate to you.
RE: Pump flow question
StoshM
RE: Pump flow question
Some of the problems with your consideration is fluid gravity, viscosity, motor load etc. Not know your application I would personally say no. There are applications where all the facts are known and motor amps would offer a reasonable guess, but I would not agree with amps unless I knew all the facts.
TD2K offers a great suggestion about renting a meter. I would recommend that.
D23
RE: Pump flow question
Regards
OleF