Gas shut-off valve

摘要: An automatic safety shut-off system for installation in a gas line or other fluid which automatically shuts off the flow of response to an emergency situation. The is characterized by three valves, each responsive different first valve includes sealing piston controlled pressure locking mechanism responds above normal pressure. second lower than downstream system. third interruption electrical power supplied machinery using from line. two toggle joints movable between locked and unlocked position. When position, retain open thereby allowing through valve. allow close, interrupting A linked pins joints, unlocking whereby chamber causes movement position