Smoke fire smoke damper valve works, normally open, 70 degrees 280 smoke damper closed, with a, but more than a telecommunications signal input, remote control can eliminate the control room is closed, generally used for peacetime air, fire up Wind common duct system, you can control the turn off unneeded air make room when the fire; normally open type smoke dampers, fire dampers closed fuse 280 degrees, normally open, output electrical signal automatic smoke dampers, this and a similar, but different fusing temperature, generally used in fire exhaust pipe through the firewall, the flue gas temperature exceeds 280 degrees automatically blown off, you can turn off the exhaust fan interaction. Is recommended for use; one way is to exhaust port and exhaust valve module canceled, changed to single outlet louvers; second method is to normally closed damper on each electric charge of the smoke into the normally open 280 degrees off damper control module to the general monitoring module. Both methods achieve the same fire code requirements, and the actual control is also very reliable. Automatic smoke dampers, Chen Yu-conditioned factory outlets (certified), Yuzhou city fire dampers provided by Wu Chen Yu Air Conditioning Equipment Co.. 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.