# What is CV of a control valve ? Free excel tool to calculate Control valve CV

**URL:** <https://forumautomation.com/t/what-is-cv-of-a-control-valve-free-excel-tool-to-calculate-control-valve-cv/684>\
**Category:** Software and Tools\
**Tags:** controlvalve\
**Created:** [December 20, 2015, 2:21am UTC](https://forumautomation.com/t/what-is-cv-of-a-control-valve-free-excel-tool-to-calculate-control-valve-cv/684 "2015-12-20T02:21:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![denizen](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@denizen](https://forumautomation.com/u/denizen)\
**Post date:** [December 20, 2015, 2:21am UTC](https://forumautomation.com/t/what-is-cv-of-a-control-valve-free-excel-tool-to-calculate-control-valve-cv/684/1 "2015-12-20T02:21:24Z")

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What is a CV?

CV is a flow coefficient which is really specking to the capacity of a valve.

If a valve has a CV of 20 that means we can pass 20 gallons of water per minute with one pound pressure drop.

CV is a measure of resistant to flow created by the valve.

we have sizing tables and formulas available for the calculation of CV.It is not a linear equation.

Valves with higher CV has less resistance to pressure

**Free tools for Control Valve CV calculation.**

[Control Valve Sizing - Steam or Vapor Rev 2.xlsx](https://cdn.forumautomation.com/original/1X/57a6d05f3a5925ea854937829417b07a85371f14.xlsx) (434.2 KB)

[Control Valve Sizing - Liquid Rev 2a.xlsx](https://cdn.forumautomation.com/original/1X/a0b3ef0df3576a6d5c7ca1dc9989fa60be8b436f.xlsx) (510.3 KB)

[Control Valve Sizing - Gas Rev 2a.xlsx](https://cdn.forumautomation.com/original/1X/9921ed6f6274cac35ff34f3472f93a1f15c538cc.xlsx) (476.7 KB)

More information and manuals can be downloaded from the following link

> **[Control Valve Excel Worksheets](https://www.control-valve-application-tools.com/worksheets/)**
>
> Excel worksheets for control valve sizing, liquid vapor pressure, gas compressibility factor, liquid pressure drop in pipe and fittings, control valve P1 and P2 vs. flow.

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<div class="post-metadata">

**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [August 5, 2024, 1:38pm UTC](https://forumautomation.com/t/what-is-cv-of-a-control-valve-free-excel-tool-to-calculate-control-valve-cv/684/2 "2024-08-05T13:38:16Z")

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**Control Valve Cv for Liquid & Gas**

![image](https://cdn.forumautomation.com/original/2X/4/42b55345c94760062abd641aed71352004795898.jpeg)

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