Jie Weinuo Star Industrial Co., Ltd. [] recommended damper damper exhaust valves, normally open fire exhaust valves, 70 degrees or 280 degrees exhaust valves closed fire remote control, usually installed in the duct through the firewall, fires off faulting, you can set the output electrical signal, the temperature exceeds 70 degrees or 280 degrees when the valve is closed, the linkage to send (up) the fan is off. Installed in the central air-conditioning duct system, the working principle is easy to control the temperature of fusion of gold, the use of gravity acting and spring mechanism to close the valve. [Jie Weinuo Industrial Star recommendation - damper] production damper, exhaust valves, exhaust port, fire dampers variety of models. The thickness of the damper according to national standards. Undertake; fire smoke production and installation works. Positive pressure valve exhaust valve _ Jie Weinuo Industrial Engineering Installation certified fire smoke exhaust valve _ Tai'an provided by 捷维诺 (Tianjin) Co., Ltd. Jie Weinuo (Tianjin) Co., Ltd. (www.jieweinuo.com) is a leader in Tianjin, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Industry leaders in Jie Weinuo staff warmly welcome all inquiries negotiations to create a better future Jie Weinuo Industries.