Control Valve Cv Calculator
Calculate the valve flow coefficient Cv for liquid service using flow rate, specific gravity, and pressure drop.
How to Use the Control Valve Cv Calculator
- Enter the required flow rate through the valve in US gallons per minute.
- Enter the specific gravity of the fluid (1.0 for water).
- Enter the allowable pressure drop across the valve in psi.
使用场景
- •Sizing control valves for process piping systems.
- •Selecting valves for pump discharge applications.
- •Verifying valve sizing in P&ID design reviews.
公式
Cv = Q × √(SG / ΔP), where Q is flow rate (GPM), SG is specific gravity relative to water, ΔP is pressure drop (psi).
常见问题
What is the Cv of a valve?
Cv is the flow coefficient representing the number of US gallons per minute of water that will flow through the valve with a 1 psi pressure drop.
What specific gravity should I use for water?
Use SG = 1.0 for water at 60°F. For other liquids, use their density relative to water.
Is this calculator free?
Yes, all OhMyCalc calculators are completely free to use.