Idaho Valve & Fitting Inc.
Your Authorized Swagelok Sales and Service Center
Cv Calculator
Cv Calculator for Valve Sizing
This calculator can be used to help select a valve with enough flow capacity for a given application. The valve flow coefficient (Cv) is a convenient way to represent flow capacity of a valve across a range of fluids and process parameters. The Cv calculator will calculate either Cv or flow using the supplied additional parameters of fluid, inlet and outlet pressure, and fluid temperature. The calculations can be performed for either liquid or gas flow. Choosing a valve with a Cv value sufficiently larger than the calculated Cv will help provide expected flow performance.
Gas pressure units are in absolute pressure, except for PSIG.
| Safe Product Selection: When selecting a product, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user. |
For additional information or resources:
- View Swagelok’s Valve Sizing Technical Bulletin
- View our extensive portfolio of high-quality valves to find the right valve for your application
- Use our Regulator Flow Curve Generator to receive a unique flow curve based on a set of user-specified application parameters for RHPS series pressure regulators
- Contact your authorized Swagelok sales and service center