Fire Dampers
- Air conditioning and ventilation systems circulating
air fire area or to more than one floor shall be provided with dampers which in special purpose to designed that close automatically in case of fire,there by preventingspread of fire or smoke. - The system shall be provided with automatic controls to stop fans in case of fire
, unless arranged to remove smoke from a fire, in which case these shall be designed to remain in operation. - Fire dampers are usually installed in systems to isolate the fire and prevent the fire from spreading. The location of dampers is usually
at the transfer wall of the area housing the fan unit or the air handler and these dampers are located in the masonry. - The damper is to be installed in the supply and return paths and should be capable of withstanding the temperature for a period of 90 minutes.
There are three types of fire dampers;
- Motorized fire damper
- Fusible link type fire damper
- Pneumatic operated fire damper
The following figures (Fig.1 & 2) shows the generally used fire dampers.
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