# Cv and valve specifications

**URL:** <https://forums.speedlife.net/t/cv-and-valve-specifications/48432>\
**Category:** NYSpeed Off Topic\
**Created:** [May 14, 2008, 12:50pm UTC](https://forums.speedlife.net/t/cv-and-valve-specifications/48432 "2008-05-14T12:50:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![drvnkd](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/drvnkd/32/109615_2.png) [@drvnkd](https://forums.speedlife.net/u/drvnkd)\
**Post date:** [May 14, 2008, 12:50pm UTC](https://forums.speedlife.net/t/cv-and-valve-specifications/48432/1 "2008-05-14T12:50:47Z")

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My question is…

Is a Cv of 0.2 on a control valve with 1/4" ports = to a control valve  
with 3/4" ports and a Cv of 0.2?

I’m looking to change the trim on a valve at work.

My knowledge base is lacking with regards to pipe, flow, and velocity.