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ANSI B16.104 - Control Valve Seat Leakage


Description
ANSI B16.104 is a testing specification for control valves. This specification has actually superseded by ANSI/FCI 70-2 Class IV. The class IV designation defines the allowable amount of leakage through the valve seat in the closed position. Class IV allows for .01 percent of the rated flow (Cv), to pass through the seat. Class IV is common for metal to metal seated valves.

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