afety solenoid valves for manual reset gases normally open
The solenoid valve type EVRM-NA is a safety valve normally open with manual reset. It is therefore essential to have a manual intervention to open the valve and to arm the mechanism that allows the maintenance of this state.
The tensioning with line current and / or condenser discharge, induced by the leak detector, causes the release of the mechanism and the consequent closing of the gas passage. If the sensor is energized due to the presence of gas, the valve remains energized and does not allow resetting.
Once the causes of the block have been eliminated, the valve can be reopened by intervening manually. This type of device, in connection with one or more gas leak detectors or alarm signals due to the presence of carbon oxides, is suitable for carrying out blocking operations of the gas line.