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bolang
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Join Date: Mar 2012
Posts: 23

Pump Flow

11/18/2015 9:59 PM

hy fellas,

i'd like to ask about centrifugal pump. is it possible to know the capacity of a centrifugal pump by putting a pressure gauge in it's discharge pipe ? how ? is there a formula ? since it is very difficult to know of real capacity just by name plate. thank you
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This discussion was "closed" on 11/19/2015 4:30 AM. No new comments are allowed.
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lyn
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Join Date: Oct 2008
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#1

Re: pump flow

11/18/2015 10:16 PM

Pump Design Equations Formulas Calculator Discharge ...

Pumps - Power Calculator - Engineering ToolBox

If you know the brand and part number of the pump, look at the pump curve for that pump. They look like this↓
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IdeaSmith
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#2

Re: pump flow

11/18/2015 10:49 PM

If you put a pressure gauge in the discharge pipe you know the pressure of the discharge pipe.

If you have a flow meter there you could calculate the hydraulic horsepower and judge back on the power of the pump.

If you create different flow conditions you can trace the pump curve.

Easiest of course is the ask the manufacturer for the pump curve.

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lyn
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#3

Re: pump flow

11/18/2015 10:57 PM

Duplicate thread alert!
Pump Pressure and Flow
Learn or perish! Good bye.
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Just an Engineer
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#4

Re: pump flow

11/19/2015 3:31 AM

The short answer is "No.".

Imagine if you would two pumps, each with same pressure at output. One is 25mm outlet, while the other is 500mm outlet.

You will need a combination of parameters to be measured to determine the actual output.

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