Control Valve Characteristics Selection | MOST SIMPLE EXPLANATION

All control valves have an inherent flow characteristic that defines the relationship between ‘valve opening’ and flowrate under constant pressure conditions

[AsadPassionateEngineer]

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[balajiarni]

Asad Shaikh - this video is what I am searching for long time. Thanks for making this video. Very easy to understand

[mohsenk]

Mon ami, vous êtes vraiment excellent, merci à vous...

[abhipathak]

Thank you Asad for making our life easy by making this video

[saquibkhan]

Please make a video control valve seat leakage calculation.

[vigneshnithi]

hi asad, how to find the Differential pressure across the valve for minimum flowrate if i don't know downstream pressure ??
how to do preliminary sizing if i don't know the downstream pressure of control valve

[atulbhagat]

Which valve characteristics used for temperature control ?

[milindketkar]

we have been sizing valves with Linear characteristics for high pressure reduction while equal % we have been using for flow control valves . That was always our rule of thumb unless there is a change of thought process over the years however with advancement in PID controls and DCS system - the valve travel can be made to behave the way we want

[kmh]

So what about quick openning, when's it used

[hareem]

Hey Asad, i am wondering that at 1:20 why the installed characteristic plot will always be same as Quick opening. I mean the graph of installed chars could look like equal % and then to compensate it we would need Quick opening.
Note that both are non linear and operating DP in a live plant may not always vary as the graph shown in video.

[vikaspatel]

What if Difference between P MAx and P Min is more than 5 ??

[fltp]

I have a positioner attached to my control valve. If my control valve inherent cahracteristic is equal percentage, then what characteristic should I select when I configure the optimisation in my positioner setting? Is it set it as linear or equal percentage? I noticed the characteristic in our positioner setting is always set as linear instead of equal percentage.

[khunteatishanil]

can u please make detail video on control station assembly?

[cck]

Good video. Can anyone tell please what is the difference between "equal percentage" and "linear"?
Thanks.

[rndtechinfokannada]

Hi sir please explain always in detail explanation is not understandable for freshers are the persons who is new to subject is not at all able to understand please give me a brief background detail about each term so that any new person or a new engineer who wants to learn this topics he will easily understand your explanation is only if somebody expert in wall design he can understand it's not for the beginners