Setting smoke damper in exhaust fan and exhaust pipe connections, not the end in the exhaust pipe set exhaust valves, exhaust valves and pay attention to the function smoke damper is completely different device. Exhaust valve usually normally closed, opened fire, and the control panel linkage exhaust fan, turn on the condition that an outbreak of fire alarm system (detector alarm), fire alarm host automatic state kitchen exhaust fan, exhaust valves automatically open linkage exhaust fan starts. Smoke damper is usually always open, but also turned a fire, but when the smoke temperature reaches 280 ℃, the exhaust damper automatically closes, the linkage has been opened fan stops running. Performance exhaust fan; exhaust system used for basements, shopping malls, large fire district, long corridors, as well as in the natural smoke situation can not meet their needs plus mechanical exhaust system. Opening plus exhaust valve exhaust port form, plate electric exhaust port forms may also be normally closed. Fans can be used in conjunction with underground diversion. Basement axial-flow exhaust fan fire, to be used in conjunction with the makeup air equipment. HTF series fire temperature exhaust fan designed specifically for high-temperature exhaust. Equipped with high-temperature fan motors, totally enclosed motor built htf fire exhaust fan, and a special motor cooling system to ensure safe use of the electric motors at high temperatures. By objective optimization design, the company's HTF temperature exhaust fan fire, the sentence has excellent high temperature performance, high efficiency, low noise, reasonable structure, small size and easy installation. Installed on horizontal, vertical, lifting can be. Kitchen exhaust fan, Chen Yu-conditioned (certified), exhaust fan Zoucheng city by Wu Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioned in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.