Exhaust fans are smoke control system in the fire protection system, which is generally linked with the fire alarm host. Setting smoke damper in the exhaust fan and exhaust pipe connections, set the exhaust pipe is not the end exhaust valves, exhaust valves and smoke damper attention is entirely different device functions. Exhaust valve usually normally closed, opened fire, and alarm host linkage, automatic alarm system is turned on condition that a fire broke out (detector alarm), fire alarm host state automatically imported into axial fans, exhaust valves open automatically linked row Smoke fan starts. Smoke damper is usually always open low noise axial fan is turned on when the fire, but when the flue gas temperature reaches 280 ℃, smoke damper automatically closes axial fan manufacturers, the linkage has been opened fan stops running. Exhaust system used for the basement, large shopping malls, large fire district, long corridors, as well as under natural draft conditions can not meet their needs plus mechanical exhaust system. Opening plus exhaust valve exhaust port form, plate electric exhaust port forms can also be normally closed. Fans can be used in conjunction with underground diversion. Basement, to be used in conjunction with the makeup air equipment. Proof axial fan model | Chenyu conditioning trusted (authenticated) | Zhangqiu axial fan provided by Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) is a leader in Dezhou, 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 . Chen Yu-conditioning in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu conditioning a better future.