The EVRM-NA solenoid valve is a normally open safety valve that can be manually reset. A mechanical device that must be manually operated to open the valve and maintain this state. The power signal triggered by the gas leakage indicator (which is provided by the line current and/or capacitor discharge) can cause the mechanical device to detach, and then the gas path is closed.

The continuous operation of the sensor due to the presence of gas causes the valve to be under voltage and unable to reset. After resolving the issue, the valve can be manually opened. This type of device can be linked to one or more gas leak indicators or carbon monoxide alarm signals, and is suitable for closing gas pipelines.