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Fire Damper Inspection

Australia | General information | Popularity - 0/10
A fire damper can be defined as a device installed in ducts and air transfer opening of an air distribution or smoke control system designed to close automatically upon detection of heat. It also serves to interrupt migratory airflow, resist the passage of flame, and maintain the fire-rated separation integrity. Its primary function is to prevent the passage of flame from one side of a fire-rated separation to the other.
Most fire dampers are installed in areas of the building that are not easily accessible. Fire dampers are installed in penetrations of fire-rated walls and floors as required by the building code, and access to the damper itself is normally through an improperly sized access door.
Fire protection systems may help handle or extinguish the fire, support occupant evacuation, and protect the property from harm. These programs may be split into active fire protection and passive fire protection.
Included in this passive fire protection system, fire/smoke rated walls and obstacles compartmentalize the building and block the spread of smoke and fire to the whole building. While entering these obstacles with ductwork ought to be prevented if possible, occasionally it's necessary.
There are three different types of those dampers: fire dampers, smoke dampers, and combination fire/smoke dampers. Fire Damper Inspection is developed to prevent the spread of fires across a ranked barrier. A fire damper is installed inside the duct in which the duct intersects the barrier. When triggered, they operate with a heat-sensitive device that melts and causes the damper parts to off.
A smoke damper may also be installed inside the duct and triggered by a smoke sensor signal within the damper. Upon detection of smoke, then the actuator will automatically close the damper components.
A combination fire/smoke damper will close upon detection of fire or smoke. An FSD may also contain an electrical heat discharge apparatus, which is flashed. It allows the damper to close in a more controlled manner instead of slamming close while the heat-sensitive device melts.
Fire dampers can be extremely difficult to test and reset due to their design. There are two main types of fire dampers: dynamic fire dampers and static fire dampers. Dynamic fire dampers have been UL tested and proven to close against system air pressure and velocity.
Static fires dampers are UL tested but have not been proven to close against system air pressure and velocity. The main difference between the two designs is dynamic dampers utilize springs to pull the curtain closed against the air pressure and velocity, while static dampers rely solely upon gravity to pull the curtain closed. The spring shape and size determine the air pressure and velocity against which the dynamic fire damper closes.
Dynamic fire dampers are becoming more popular with designers as dynamic dampers may be used in a static system (fans off) or dynamic system (fans on), while static dampers can only be used with static systems.
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