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  1. brillntblk92

    ANSI/FCI 70-2-2006 Control Valve Seat Leakage Standard Clarification

    Great, thank you. That "rated valve capacity" was confusing, but it didn't make sense.
  2. brillntblk92

    ANSI/FCI 70-2-2006 Control Valve Seat Leakage Standard Clarification

    Under table 1, class IV, the maximum seat leakage rate is "0.01% of rated valve capacity". Under para 5.1.2, the standard states "pressure of test medium shall be 45-60 psig...". Flow capacity of a valve is based on Cv and pressure differential. How would flange class effect the maximum seat...

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