| 摘要 |
<p>An improved double ball valve powered emergency release coupling includes two fluid-carrying conduits, each having a ball or plug valve received therein, which are prevented from being decoupled unless both ball or plug valves are moved to a closed position prior to decoupling. The improved coupling prevents inadvertent spilling during decoupling. A mechanical or hydraulic actuator corresponding to each valve element is provided for sequentially rotating each valve element between opened and closed positions.</p> |
