What is a fire damper?

The fire damper is a kind of temperature control of memory fusion alloy, which is closed by gravity and spring mechanism. Among the new products, there are also those that use memory alloy to generate deformation to close the valve.

Fire dampers are passive fire protection devices installed in buildings to prevent the spread of fire and smoke through openings in HVAC (heating, ventilation and air conditioning) ductwork or firewall walls, floors or ceilings.

The fire damper is a normally closed valve, which is opened by the control center through 24V DC or manually, and it will automatically close at 280 ° C, and the reset must be done manually. Its function is: when the temperature of the flue gas reaches 280°C, the evacuation of the people has been basically completed, and the smoke exhaust has no practical significance. At this time, the flue gas is already on fire, and the valve is automatically closed to avoid the spread of the fire. The smoke exhaust outlet of the system can also use a normally closed fire-proof smoke exhaust outlet, and the smoke exhaust fire damper on the branch pipe is cancelled. In the event of a fire, the air outlet is opened by the control center through 24V DC or opened manually. When the smoke temperature reaches 280°C, it will be automatically closed, and the reset must also be done manually. Smoke exhaust dampers should also be installed at the entrance of the smoke exhaust fan room to prevent the fire from spreading to the floor where the fan room is located.