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Fire damper is usually installed and used between two fire zones to protect each zone during a fire. Usually, the walls, doors and ceilings of the rooms are made of fire-resistant materials, and in the event of a fire, the only way for fire, hot air, and high-temperature smoke to penetrate is through air channels. By installing a fire damper on the wall blade (the boundary wall separating two rooms, which is known as two zones or fire zones). Hot air and fire can be prevented from entering and spreading between different zones.
The operation of the fire damper is such that the vanes are always closed by default with the spring pressure installed on the connecting links between the vanes; The blades are kept open with a special alloy fuse. The fuse is made of a special alloy that melts at a temperature of 74 degrees, and the spring pressure closes the blades and blocks the channel.
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