Cv Value For Air Valves

The required cv range for this application than is.0141 to.0703.

Cv value for air valves. This calculator can be used to help select a valve with enough flow capacity for a given application. Founded at 1980, value valves co., ltd. For measuring the valve capacity of control valves, the coefficient cv or its metric equivalent kv is adopted.

Cv = (25 gpm) (1 / (1 psi))1/2. Cv is based on the volume flow rate of water at 60°f through a device within one minute at a 1 psi differential. Cv is the flow coefficient in imperial units.

Full port valves will have a higher cv than reduced port valves. Because cv is perceived as a complex expression, many designers avoid learning about it and, hence, become ignorant of its importance and proper application. Cv — an essential design and diagnostic tool.

With global layout and firmly foundation at asia, we are now recognized as an international brand in taiwan. It can be assumed that the tests are done with water (unless otherwise noted), using a specific gravity of 1.0, 1.2 centistoke viscosity, and a standard temperature of 60 degrees fahrenheit. However, there is a problem with using this equation in pneumatic applications.

The cv rating for each valve is listed in the tables found in the valve catalog. With c v = 1.0 and 200 psia inlet pressure the flow is 100 standard cubic feet per minute (scfm). Fill a value for the inlet pressure, the outlet pressure and the minimal required flow rate.

Gallons per minute of water at 60°f that will flow through a control valve at a specified opening when a pressure differential of 1psi. And brings the value much closer to that of water or air, 1.0. Every pneumatic device possesses a specific conductance, identified as cv.