Itron has developed a complete range of regulators with an integrated safety valve. These provide a compact and safe solution for residential, industrial & commercial customers using modern gas distribution gas networks at a few bars of pressure.
The safety valve offers protection if there is an abnormal increase in downstream pressure. It immediately interrupts the gas flow, protecting the downstream installation from any leakage defect in the regulator, and can only be reset manually by a qualified operator. 
Itron safety valves are designed to shut themselves off under specific conditions such as signal loss in the detection system, excess pressure (OPSO), or (optional) if there is a fall in downstream pressure (UPSO), due to downstream pipe rupture, for example. This increases the safety of the installation. The safety valve is completely independent of the regulator but both are integrated into the same body, making a self-contained, autonomous & extremely compact unit.