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  1. 456LachTray

    Flowrate through proportional control valve.

    Hi Latexman, Following your suggestion, I found from my vendor data on Cv vs. %open as you can see here (page 2/4): http://www.buerkert.de/products_data/datasheets/DS2836-Standard-EU-EN.pdf. Actually the characteristics curve of valves are shown. And it in fact shows relationship between...
  2. 456LachTray

    Flowrate through proportional control valve.

    Hi Matt, So, am I using right formula and only correction should be K as a function of u? Do you mean inherent characteristic or installed characteristic curve by 'valve curve'? Thanks, Viet
  3. 456LachTray

    Flowrate through proportional control valve.

    Hi everyone, At our laboratory we are using two proportional valves of type 2836 to control a level control system. I would like to know the formula computing flow rate through those valves. Is the formula Q = K*u*sqrt(deltaP) correct? (where K is a constant, u is valve opening and delta P is...
  4. 456LachTray

    Is valve discharge coefficient constant?

    Thanks for your help! "Plus, by definition, a control valve is being controlled so the system is self correcting..." --> However, in this case, the valve connecting 2 tanks is fixed at a certain position and has no control on it actually. What can you say about this? Also, what adjustment...
  5. 456LachTray

    Does valve discharge coefficient vary?

    Hi, I am building a mathematical model for a two tanks system (as can be seen in the attachment)which can operate either as non-interacting (when h2 < H) or interacting system (when h2 > H). In order to do so I need to determine the discharge coefficient of the valve connecting two vessels B1...
  6. 456LachTray

    Is valve discharge coefficient constant?

    Hi everyone, I am building a mathematical model for a two tanks system (as can be seen in the attachment)which can operate either as non-interacting (when h2 < H) or interacting system (when h2 > H). In order to do so I need to determine the discharge coefficient of the valve connecting two...

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