High-quality circular fire damper Texas the Feiyu manufacturing sales hotline: 13969272212 
 : Install fire dampers in ventilation and air conditioning system to send back to the duct on the road, usually was turned on, when the temperature reaches 70 ° C gas pipeline fire, fusible film fuse, valves automatically shut down in the torsion spring force, within a certain time to meet the requirements of fire-resistant stability and fire integrity, since the role of the fire valve. The valve is closed, the output off signal. Smoke damper: pipeline installation in the exhaust system, usually the general was turned to open the manual or electric fire from the smoke effect. Closed when the exhaust pipe, flue gas temperature reaches 280 ° C, in a certain period of time meet the fire-resistant stability and fire integrity requirements, and to exhaust the role of the valve. 
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