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Thread: Calculating gpm

  1. #1
    Join Date
    Jan 2001
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    Calculating gpm

    Need to calculate gpm. I have a taco flow valve I can use. What is the other formula where you use design gpm divided by actual gpm orcsomething like that. Thanks

  2. #2
    Join Date
    Sep 2007
    Boise, ID
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    Not sure that I fully understand your question about design vs actual unless you mean pump data plate vs actual. However, each flow valve will provide x gpm at Y pressure. Valve characteristics are different so you need to have the mfr.s flow chart for that valve to determine flow. Some valves have ports on each side of the valve to determine delta-p, get your delta-p and check printed literature. Not sure if that answers your question.
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