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Friction Loss in Fittings - Watts Water Technologies
media.wattswater.comwww.orionfittings.com Technical 36 Carrying Capacity and Friction Loss for Schedule 40 Thermoplastic Pipe 1⁄ 2 in. 3⁄ 4 in. 1 in. 11⁄ 2 in. 2 in. 3 in. 1 1.13 2.08 0.90 0.63 0.51 0.22 2 2.26 4.16 1.80 1.26 1.02 0.44 0.77 0.55 0.24 0.33 0.07 0.03
Friction Loss in Fittings - Watts
media.wattswater.comFriction Loss in Fittings Valves As an aid, liquid sizing constants (Cv values) are shown for valves. These values are defined as the flow rate through the valve required to produce a pressure drop of 1 psi. To determine the pres-sure drop for a given GPM the following formula may be used. ∆P = (G2)(SG)/Cv2