Fire valve
Detailed introduction:
Fire-proof valve is a kind of temperature control of memory fused alloy, which is closed by the action of gravity and spring mechanism. New products also use memory alloys to deform and close valves. [1]
Its function is: when the smoke temperature reaches 280 C, people have basically evacuated, smoke exhaust has no practical significance, and the smoke has been ignited at this time, the valve automatically closed to avoid the spread of fire. [2]