41 A 6in globe valve is tested in the laboratory to evaluate

4.1. A 6-in. globe valve is tested in the laboratory to evaluate its flow coefficients. At a flow rate of 1200 gpm, the net pressure drop is 6.3 psi. Calculate C, Ca, C, and K

Solution

Solution:-

Given

q = 1200 gpm

p = 6.3 psi

d   = 6 inch

C_v = q/(p)

C_v = 1200/(6.3)

C_v = 478   Answer

K₁ = 890.9 d⁴/(C_v)²

K₁ = 890.9 *6⁴/478²

K₁ = 5      Answer

C_d = C_v/d²

C_d = 478/6²

C_d = 13.27    Answer