FORWARD DIRECTION CLOSING SAFETY VALVE DEVICE FOR AUTOMATICALLY SHUTTING THE GAS PIPELINE PASSAGE OFF DURING PRESSURE REDUCING FAILURE

摘要

The invention relates to a pressure reducing valve provided with a safety valve. A safety valve 17 includes a stopper 171 which is moved away from its seat by a timing device 110 which includes a transmission member 115 which puts the stopper 171 in the open position. When the pressure reducing valve has an operational defect and gas at high pressure reaches the valve 17, the latter is automatically closed despite the transmission member 115 of the timer 110. Application to protecting propane gas supplies to dwellings.