280 degree fire damper

The 280 degree fire damper is used on the smoke exhaust system pipeline. It is normally open and can be used to exhaust smoke in case of a fire. When the smoke temperature reaches 280 degrees, the fire damper closes and the interlock fan closes;
280 fire dampers should be normally open, also known as high-temperature fire dampers, and are generally installed in environments with high temperaturesventilation ductWhen the temperature reaches80s generationfusible alloyMelting, valve closed, and can be used simultaneously24V electrical signal control. If it is 280smoke exhaust fire damperIt should be normally closed and installed in the smoke exhaust duct. In case of a fire, the control center will give an electrical signal to open the smoke exhaust. When the temperature reaches280 hoursfusible alloyThe melting valve is a secondary action valve that closes.