Fire damper is installed in the ventilation, air conditioning system, the return air duct smoke damper on the road, usually was turned on when the gas pipeline fire when the temperature reaches 70 ℃, fusible film fuse, the valve automatically under the force of the torsion spring closed damper making, within a certain period of time to meet the fire resistance stability and fire integrity requirements, from the effects of smoke fire retardant across the valve. When the valve is closed damper, the output signal is turned off. Fire and smoke control valve, normally open, 70 degrees is closed with a damper plant, but more than a telecommunications signal input, remote control can eliminate the control room is closed, generally used for peacetime air, fire, wind up sharing duct systems, fire When can control the wind up turning off unneeded rooms; when the exhaust fan is a fan of quality products, we carry out assembly operations of its chassis, but also pay attention to certain matters, the only way to fully demonstrate its performance, So chassis exhaust fan assembly on the main points which we explain in detail below: Rich ventilation equipment (Figure) _ _ Huaibei damper factory dampers provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) adhere to the "people-oriented" business philosophy, has a professional staff, and strive to provide the best products and services to contribute to the community, and to welcome new and old customers to visit and sincere cooperation for a better future. Rich ventilation equipment - your trusted friend, Company Address: Shandong Dezhou City, Shandong right Wu Tun, Contact: Zhang.