3C smoke exhaust fan manufacturer quotation

>Smoke exhaust fire damper is also one of the common fire dampers. It is different from ordinary fire dampers in that it is installed on the smoke exhaust system pipeline, while ordinary fire dampers are installed on the supply and return air pipelines of ventilation and air conditioning systems. .
>There are also differences in the opening and closing states of smoke exhaust fire dampers. Ordinary fire dampers are usually open. In a fire, when the temperature of the gas in the pipeline reaches ℃, the fusible piece fuses and the valve automatically closes under the force of the torsion spring. . The smoke exhaust fire damper is usually closed and can be opened manually or electrically to exhaust smoke during a fire. It is a valve that closes when the temperature of the flue gas in the exhaust pipe reaches ℃. It can meet the requirements of fire resistance stability and fire resistance integrity within a certain period of time and function as a smoke exhaust valve.
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