Cv (Also see Kv)
The flow coefficient - Cv - allows comparision of flow capacities of valves at different sizes, types and manufacturers. The flow coefficient is in general determined experimentally and express the flow capacity.

The flow coefficient - Cv - required for a specific application can be estimated by using specific formulas for the different fluids or gases. With the estimated Cv value - the correct valve can be selected from the manufacturers catalogues.

In North America the flow is usually described in imperial units - GPM (gallons per minute) of water that a valve will pass for a pressure drop of 1 lb/in2 (psi).

Conversion between Flow Coefficient Cv and Flow Factor Kv can be expressed as:

Cv = 1.16 Kv (1)
Kv = 0.853 Cv (2)

We provide this glossary to assist clients in the selection and operation of our complete line of Ultra-Pure Laboratory Ozone Generators, Ozone Gas Analyzers, and Ozone Accessories, as well as services such as material exposure testing.