Need explaination for DBB
Need explaination for DBB
(OP)
"No equalizing hole design on the ball i.e DBB feature in both closed & open positions" need explaination about this statement.
TQ.
TQ.
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Need explaination for DBB
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RE: Need explaination for DBB
RE: Need explaination for DBB
RE: Need explaination for DBB
David
RE: Need explaination for DBB
By being present however it prevents the valve cavity from being blown down while in service. Many operators want to blow down the body cavity with the valve in the open position as a means of verifying the integrity of the valve seats.