The fire damper is installed on the air supply and return air lines of the ventilation and air conditioning system, and is normally open. When the gas temperature in the pipeline reaches 70 °C in fire, the fusible piece is blown, and the valve is automatically closed under the action of the torsion spring force. The valve can meet the requirements of fire resistance stability and fire integrity in time, and it acts as a fire barrier. When the valve is closed, the output close signal. Let's take a look at the knowledge of the role of fire dampers shared by professional fire damper manufacturers today.
In the air duct of the air conditioning system, the purpose of the fire damper is to quickly cut off the airflow when the fire occurs, to avoid the spread of fire. When the fire is present, the air duct is affected by the surrounding temperature and the temperature rises. When the fire makes the wind When the channel reaches a certain temperature, the fusible piece is melted, and the valve plate originally connected by the fusible piece is immediately separated from the fusible piece and closed to prevent the airflow. In order to stop the continuous supply of air to the system, electrical signals on the fire damper and interlocking installation, the valve plate can be signaled when the valve is closed, so that the fan stops running.
The fire damper is a valve used to block the passage of smoke and flame from the fire zone and to meet the requirements of fire resistance stability and fire integrity for a certain period of time. In order to reduce the damage caused by the fire to a minimum level, it is necessary to take effective fire prevention and smoke control measures to control the spread of fire, and the reasonable setting of the fire damper in the ventilation, air conditioning and smoke control systems plays an important role. effect.
In addition, the fire damper also functions as a smoke-blocking fire. In the air supply system, the wind sent by the blower must be distributed to the branch pipe through the main pipe; in the smoke exhaust system, the flue gas enters the row from the branch pipe to the main pipe. The smoke fan is discharged. When a fire breaks out in a building, in the ventilation and air conditioning system, in order to prevent the fire from spreading through the air supply system, when the gas temperature in the air supply system reaches 70 °C, the fuse on the fire damper mechanism acts, and the valve also closes the valve. , cut off the passage of smoke and fire along the wind pipe. Similarly, in the smoke exhaust system, when a fire occurs, the exhaust valve is opened to stop the exhaust, in order to cut off the high temperature flue gas in the exhaust pipe, to prevent the fire from spreading to another fire zone, when the exhausted flue gas temperature reaches At 280 °C, the smoke damper and the fuse on the exhaust vents act, and the valve must be automatically closed to prevent smoke exhaust. It can be seen that the fire damper and the smoke venting valve have achieved the general pass, and the broken fire escapes the fire.
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