API 6D 6.17.3 question
API 6D 6.17.3 question
(OP)
Hello,
API 6D section 6.17.3 states:
My question is simple. What is "the overlap contact angle between the seat and obturator" (ball)?
Thanks.
Jeff
API 6D section 6.17.3 states:
Quote:
6.17.3 Allowable deflections
For ball valves, the total torsional deflection of the extended drive train when delivering the design torque shall not exceed the overlap contact angle between the seat and obturator.
Deflections of the extended drive train shall not prevent the obturator from reaching the fully closed position
My question is simple. What is "the overlap contact angle between the seat and obturator" (ball)?
Thanks.
Jeff





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RE: API 6D 6.17.3 question
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