Fuel gas Emergeny Cut-off Valve

 Fuel gas Emergeny Cut-off Valve infomation:
Fuel gas Emergeny Cut-off Valve always are mainly  used in the following situation:
1)When the instrument inspect the leaking of fuel gas ,the mergeny Cut-off Valve will cut off the gas automatically.
2)When the instrument inspect the temperature and pressure of point are higher than assigned data,the cut-off valve will close the gas supplying valve automatically.
3)When the building occurs the fire,the cut off valve will cut off the building gas