Valve Cv Formula Gas

The pressure drop or flow rate through a valve or orifice plate is typically calculated using the a flow coefficient, cv or orifice diameter.

Valve cv formula gas. The equations below can be used to determine: Articles you may like : They express flow coefficient cg or kg as the flow rate of water in g.p.m.

This is our valve c v calculator. In simple terms, a fully open control valve with a cv of 14 usgpm/psi passes 14 usgpm of fluid with 1 psi pressure drop. It is commonly understood that nearly every pneumatic device creates a flow restriction in the system.

Ratio of pressure differential available across the valve to total head loss along the process line at various operating conditions. A simplified version of the cv formula for sub critical gas pressure drop is shown below: The formula used to select the valve cv with the specified differential pressure is:

The use of this flow coefficient (c v) calculator leads to a standard calculation to compare valve capacities. If so, the valve needs either a modification or replacing, to meet. Flow rate, given the cv and δp cv, given the flow rate and δp

The cv rating for each valve is listed in the tables found in the valve catalog. C v calculator for valve sizing. The cv was designed for use with liquid flows, it expresses the flow in gallons per minute of 60º f water with a pressure drop across the valve of 1 psi.

For a specific gas control valve, the flow coefficient cg or kg is determined experimentally by control valve manufacturers, and you can found it in manufacturers technical specifications. This article demonstrates how to convert between these two parameters when performing functions such as selecting a valve with an equivalent pressure drop to a given orifice plate. Flow for a given cv is typically calculated from the following formula.