Problems calculating pump flow
Problems calculating pump flow
(OP)
Hi all,
got a bit of a problem with a pump.
Data:
liquid handled: hydraulic oil
discharge pressure: 70-80 kp/cm2g
suction pressure: 0-0.1 kp/cm2g
efficency: 75%
speed: 3550rpm
rotation: clockwise
seal type: mechanical
weight: 13kg
frequency: 60Hz
voltage: 440V
Viscosity @ 40degC is 32.5
viscosity @ 100degC is 6.4
is there anyways of calculating pump flowrate from this
thank you
got a bit of a problem with a pump.
Data:
liquid handled: hydraulic oil
discharge pressure: 70-80 kp/cm2g
suction pressure: 0-0.1 kp/cm2g
efficency: 75%
speed: 3550rpm
rotation: clockwise
seal type: mechanical
weight: 13kg
frequency: 60Hz
voltage: 440V
Viscosity @ 40degC is 32.5
viscosity @ 100degC is 6.4
is there anyways of calculating pump flowrate from this
thank you





RE: Problems calculating pump flow
viscoty units are cst and the inlet and outlet pipe diameter are 80mm
thanks
RE: Problems calculating pump flow
RE: Problems calculating pump flow
if the density was known how would the flow be known?
would this be accurate?
RE: Problems calculating pump flow
RE: Problems calculating pump flow
RE: Problems calculating pump flow
RE: Problems calculating pump flow
If there was a flow meter available it would be used
RE: Problems calculating pump flow
RE: Problems calculating pump flow
RE: Problems calculating pump flow
This is easy to see in that the data provided could apply to a significant range in size & style of pumps. The weight of the pump and inlet /outlet diameter do not help much at all.
You could assume that it is a 3" centrifugal style pump. You could probably look up a typical pump curve for that on the internet.
RE: Problems calculating pump flow
RE: Problems calculating pump flow
Mark Hutton
RE: Problems calculating pump flow
Are you aware that temporary, clamp-on ultrasonic flow meters exist that can measure flow accurately ?
They do not work on all liquids, but I would assume that hydraulic oil is a clear liquid that should be acceptable to this kind of meter.
I would at least attempt a flow measurement befor I would be forced to "guesstimate" an answer.
One example of many, many vendors
h
Let us know about your final decision
-MJC
RE: Problems calculating pump flow
Get pump data information from nameplate, contact supplier or search online for pump curve.
Check pump pressures in field (dead head condition), see where you are on the curve.
If you believe this is incorrect, troubleshoot (rent a flowmeter, timed 5 gallon bucket test, receiver level drop over time, etc).
RE: Problems calculating pump flow
The answer is "no"
But I can tell you already know that.
Perhaps you might want to elucidate.
Clearly the information you have been given is insufficient for the task.
Cheers
Steve