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Recent content by wbic1

  1. wbic1

    What is the P&ID symbol of a double block and bleed valve (DBB) (Not two independent valves and a bleed valve) ?

    Is there a P&ID symbol for a double block and bleed (DBB) valve being used on a P&ID? I am not asking for symbols which show two seperate valves and a bleed valve. The symbol I am looking for is one symbol which represents a DBB valve.
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