Cv Value For Air. Cv = qg (g x t) 816 x p1 qg = cv 816 x p1 g x t note: Equations displayed for easy reference.
Many manufacturers around the world have adopted cv as the standard value to express the flow capacity of their components. It describes the amount of water from 5° to 30°c which flows through the valve at a pressure loss of 1 bar. Kv = 0.865 · cv cv = 1,156 · kv (equivalence between flow coefficients kv and cv) at valves.
If you want to calculate the cv value and flow rate outside of the specified units, please contact us.
Calculating the flow rate from the cv value requires complex calculations. For measuring the valve capacity of control valves, the coefficient cv or its metric equivalent kv is adopted. This calculator can be used to help select a valve with enough flow capacity for a given application. Cv = qg (g x t) 816 x p1 qg = cv 816 x p1 g x t note: