# Cv Calculation For Gas Control Valve ### Equations displayed for easy reference.

Cv calculation for gas control valve. Piping geometry factor of a control valve with attached fittings f lp 5.5 liquid critical pressure ratio factor f f 5.6 expansion factor y and specific heat ratio factor f 5.7 pressure differential ratio factor x t 5.8 pressure differential ratio factor for a valve with attached fittings x tp 5.9 reynolds number factor f r C v & flow calculator. Online calculator to quickly determine steam flow rate through a valve.

Cv = (25 gpm) (1 / (1 psi))1/2. Enter orange boxes with input data. C v calculator for valve sizing.

As said, cg = c1 * cv. For a specific control valve, flow coefficient cv/kv is determined experimentally by control valve manufacturers, and you can found it in manufacturers technical specifications. This is our valve c v calculator.

When gas, instead of liquid flows through this valve does the cv remains same. Control valve cv calculation in deciding the size of the control valve that (port size) we need to calculate the cv value of the process (calculated cv) by calculating cv has educated more than 50 years, which is involved in. Determine the piping geometry factor (f p) and the liquid pressure recovery factor (f lp).

The cv was designed for use with liquid flows, it expresses the flow in gallons per minute of 60º f water with a pressure drop across the valve of 1 psi. A valve cv can be described as the number of gallons per minute (gpm) at 60 o f (15.5 o c) that will pass through a valve with an associated pressure drop of 1 psi. The coefficient of flow (cv) is a formula which is used to determine a valve’s flows under various conditions and to select the correct valve for a flow application.

The valve flow coefficient cv or its metric equivalent kv has been adopted universally as a comparative value for measuring the capacity of control valves. [m3/h] for a pressure drop of 1 psi [1 bar] across a flow passage [flow coefficient: Gas velocity and pressure profile inside a control valve at this point, i need to point out that in addition to flow being proportional to the square root of the pressure drop ratio, it is also proportional to the square root of the density at the vena contracta.

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