# What are the control valve flow characteristics?

**URL:** <https://forumautomation.com/t/what-are-the-control-valve-flow-characteristics/957>\
**Category:** Valves\
**Created:** [April 3, 2016, 8:04pm UTC](https://forumautomation.com/t/what-are-the-control-valve-flow-characteristics/957 "2016-04-03T20:04:48Z")\
**Posts on this page:** 1\
**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:** [April 3, 2016, 8:04pm UTC](https://forumautomation.com/t/what-are-the-control-valve-flow-characteristics/957/1 "2016-04-03T20:04:48Z")

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**Control Valve Flow Characteristics**

Linear - Flow is directly proportional to lift at constant pressure drop.

Equal Percentage - Flow changes by a constant percentage of its instantaneous value for each unit change lift.

Modified Flow- Combination of linear and equal percentage.

Quick Opening- Flow increases rapidly in a linear relationship with plug lift reaching a max.value at a low lift On-Off service.

 ![Control Valve Flow Characteristics](https://cdn.forumautomation.com/original/1X/589df7bd39eb35d041d9531cf29d00474cdf8e6a.jpg)