Cv Value For Valves Definition

For example a valve with a cv of 10 will flow 10 gpm with a 1 psi pressure drop.

Cv value for valves definition. The formulas provided here are simplified for general use. Founded at 1980, value valves co., ltd. Q is the rate of flow (expressed in us gallons per minute), sg is the specific gravity of the fluid (for water = 1), δ p is the pressure drop across the valve.

To characterize the standard valves, one gives a kvs coefficient, which corresponds at the coefficient kv for a nominal displacement of h 100 of the valve. The engineer of record typically specifies the differential pressure that should be used when selecting the full flow cv of the valve. By definition, a cv value of one is the cv required to.

Kv = 0.865 · cv cv = 1,156 · kv (equivalence between flow coefficients kv and cv) Having selected the basic valve design, consult the For a quick guide to valve designs, see table 3.

Check out the definition of cv to understand more clearly. 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. The valve's flow coefficient, cv, is a value that is determined by flow testing for each valve size.

Q is the flowrate, gpm. The flow coefficient for a control valve which in full open position passes 25 gallons per minute of water with a one pound per square inch pressure drop can be calculated as: It is defined as the flow rate in us gallons per minute [gpm] of water at a temperature of 60º fahrenheit with a pressure drop across the valve of 1 psi.

The valve flow coefficient, cv, is the number of u.s. For measuring the valve capacity of control valves, the coefficient cv or its metric equivalent kv is adopted. Cv — an essential design and diagnostic tool.