Online Cv Calculation For Control Valve

Having selected the basic valve design, consult the

Online cv calculation for control valve. If flow capacity required is known and valve selection is desired, to calculate cv with the following formulaes and select appropriate valve from the manufacturers cv factor chart Approximate flow capacity can be determined for valves by using the given cv factor for a valve and applying them to the following formulae’s. Excel® worksheets that perform calculations of use to those who deal with, size or apply control valves.

For measuring the valve capacity of control valves, the coefficient cv or its metric equivalent kv is adopted. The valve flow coefficient (c v) is a convenient way to represent flow capacity of a valve across a range of fluids and process parameters.the c v calculator will calculate either c v or flow using the supplied additional parameters of fluid, inlet and outlet. Flow coefficient (cv and kv) pressure drop coefficient zeta (ζ) discharge coefficient (c) flow rate (q) flow velocity (v) head drop (δh) pressure drop (δp) cavitation number

The speed of sound in steam will depend upon the steam temperature and the quality of the steam, but can be calculated from equation 6.4.2 if the conditions are known (mach. They express coefficient cv/kv as the flow rate of water in g.p.m. Calculating the flow rate from the cv value requires complex calculations.

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. When sizing (calculating which size valve is needed for your application ) a control valve specialist needs to calculate the flow coefficient. Control valve cv refers to the flow coefficient of the valve.

Books i have written or recommend. Flow coefficient is an imperial measurement and is defined as: It allows you to calculate the flow or c v (flow coefficient) to make the relationship visible between the pressure drop (the difference in pressure between two points in a network transporting a liquid or gas) and the flow rate.

This calculator can be used to help select a valve with enough flow capacity for a given application. Each valve has its own flow coefficient. Pressure profile fluid flowing through a control valve obeys the basic laws of conservation of mass and energy, and the