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  1. joeversa

    FLOW TEST PER NFPA T3.21.3-1990

    We're presently working on a new 4-way 1/2" NPT ported valve with an internal fixed flow orifice diameter of .438") and we're performing the above test to find the Cv. Our set up follows that as described by the above subject standard. The problem we're having is that when we test for...

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