Automatic shut=off valve for gas pipelines - is controlled by timer under normal conditions, and is closed by gas pressure when pipeline fails
PT85620A
Shutdown safety valve device before behind the proper front to automatically interrupt the gas passage through their respective conduct always that any deficiency in the pressure reduction system is verified
FR2619885A3
Safety valve device for closing the gas piping in the event of a regulator failure
CA1292659C
Forward direction closing safety valve device for automatically shutting the gas pipeline passage off during pressure reducing failure
AU7740787A
Forward direction closing safety valve device for automatically shutting the gas pipeline passage off during pressure reducing failure
