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  1. Tim A

    Derivation of air flow constant 4005

    thread14-92174 From Bernoulli's equation (P1-P2)/Rho = V2/2g (i.e static pressure difference creates flow) 1 lb/sq.ft = 0.1922 inches of wc 1g = 115820 ft/min2 So V = [(2 x 115820)*dP/(0.075 x 0.1922)]1/2 i.e V = 4008.6 x dP1/2 (there may be some conversion problems for the costant to be high...

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