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  1. JulioJ

    Maximum allowed leakage test calculation for a Class IV control valve

    Thanks for your reply hacksaw and sorry for the my late response, I'm still new on using this forums.
  2. JulioJ

    Maximum allowed leakage test calculation for a Class IV control valve

    Should I use 1 psi differential pressure in the formula, resulting on 0.3 GPM?
  3. JulioJ

    Maximum allowed leakage test calculation for a Class IV control valve

    Hi, I've seen some posts regarding control valve leakrate calculation for testing against FCI-70-2 for Class IV valves. Although it's pretty straight forward calculation, I'm not sure what differential pressure should I use in the flow sizing formula Q=Cv*SQRT(DP) if I want to calculate the...

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