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The CV value is the flow rate required to generate 1 psid of pressure loss through the valve. Since pressure drop follows a basic square law the relationship between Cv, flow and pressure loss is as follows:
DP = k x Flow^2 eq 1
Where k is a constant that represents the flow shape in the wide open condition.
Since Cv is the flow rate at 1 psi of pressure loss then it follows that
DP = k x Cv^2 = 1 eq 2
solving for k from eq 2 yields
k = 1/Cv^2 eq 3
substituting eq 3 into eq 1 yields
DP = (Flow/Cv)^2
Now you have an equation that will tell you the pressure and flow relationship for that particular valve with a particular fully open Cv value.
In short, the higher the Cv value the more flow the valve will allow for the same pressure loss or the less pressure loss for the same flow.
Good luck
What else can I help you with?
What is valve cv?
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Cv, or flow coefficient, is a measure of a control valve's capacity to allow fluid flow. It quantifies the amount of fluid (in gallons per minute) that can pass through a valve at a specific pressure drop (usually 1 psi). In gas flow applications, a higher Cv indicates the valve can handle greater flow rates, making it crucial for selecting the appropriate valve for specific system requirements. Understanding Cv helps engineers optimize system performance and maintain desired pressure and flow conditions.
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How calculate control valve flow rate?
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What does cv mean on an application?
Curiculum Vitae
What does cv mean in french?
If you mean with CV curriculum vitae, it means Lebenslauf.
