Control Valve Sizing Calculation Explained | Valve Flow Coefficient(Cv)

In this video, I have shown control valve sizing calculation examples. By using this method, you can identify correct valve size for your application.
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[@stephenvilawa7298]

Sir, Thank You very much. This valve sizing calculation is very simple and made my design easy. I have got to thank you again and again.

[@InstrumentCalibration]

Glad you liked it

[@Wajah-ae-mahobbat]

How to calculate Cv without Delata P? Could you please explain? During the Control valave selection we don't have Pressure drop across control valve value?

[@mohantyentertainment6579]

That's right. Tell us how to calculate Cv value without DeltaP

[@user-fb3lp5vl7i]

very good explain how to select a valve

[@InstrumentCalibration]

Glad it helped

[@penumakabhanu3228]

Sir is that pressure drop is across the valve only? How to calculte del P for that valve practically

[@AnkitYadav-kr8tz]

Sir this valve size is just for water line..?? If we have to take with steam line will this equation works ???

[@user-fb3lp5vl7i]

suppose a valve have 12.91 but cv 12 ur taken and overflow is more than 12.91 then how it helpful to controlling the valve

[@EduardoNestorAlvarez]

I would not have chosen the maximum flow valve Cv=12, if there is no other specification, the valve will not have sufficient capacity for the application.

[@senthilnataraj7428]

Same calculation for gas, steam and fluid flow ?
Why valve size depends on cv?

[@InstrumentCalibration]

Hello Senthil
Yes, It should be the same calculation. However, you need to change specific gravity of fluid for different fluids.

[@Kingstonkings1]

Only we need to take psi and gpm unit for Cv calculation

[@aliansari5379]

How to calculate for the steam line ?

[@iamimran5880]

Why you choose 17 ?why not 20 ?

[@prasaadkrishna]

Cv Vs Valve size , wats the calculation?

[@various...9808]

I know How to Calculate CV but How To Get that size i cant Understand or Can you please Explain where can i Get that Chart size

[@EduardoNestorAlvarez]

Valve providers let you use Cv charts o data base. In addition mosto of them let you use theri sizing software on line or let you download the sizing software

[@AnkitYadav-kr8tz]

How did you get that 20 CV for first calculation.. can you explain please?

[@NareshKumar-nm1zk]

Sqrt of 100 is 10 . So 200/10 is equal to 20

[@InstrumentCalibration]

Hello Ankit
Yes, Naresh explanation is correct.

[@InstrumentCalibration]

Hello Naresh
Thanks for your explanation. I really appreciate it.

[@MrSidra2009]

How can i know the table of valve

[@JoeCoz17]

You should not pick a valve size with less cv then the calculated cv, incorrect.

[@giftsadique1806]

Calculate it without pressures drop