Wedge Gate valve drift internal diameter

[KevinNZ]

Is there a minimum required drift/internal diameter for solid wedge gate valves?

 

[jbeckhou]

See API-6A

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[KevinNZ]

Thanks jbeckhou

API-6A table 34 was a good start but how to relate API Nominal Bore Size to ANSI B16.34 valves? e.g What is the Nominal Bore Size of a class 300 DN200 gate valve?

Do ANSI B16.34 valves have a min. Drift diameter?

 

[PeterIgg]

Would Table 1 in API 6D not be relevant? 4.4.2 Full-opening valves shall be unobstructed in the fully open position and have an internal minimum circular opening etc etc. I do not believe that B16.34 goes into that area itself.