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It all depends on the design of the seats. I take it to be a Trunion Mounted ball valve?

Thanks for your reply. The one you refer to is about the 'old' bubble tight or 'zero leakage' discussion. I recently had some issues with a third partty inspector about this subject. This valve I am talking about isn't bubble tight and doesn't have zero leakage by any standard. It is currently...

I am involved in developing a lift and turn plug valve for sand/slurry application. My job is to functionally test our design and give feedback. The customer spec and leakage rate for the seat test seems to be based on Ball Valve results and not reachable for plug type valves. Does anyone have...