Texas Horizon Air Conditioning Equipment Co. (www.hxktsb.com) located in Dezhou City, Shandong Province, Wu Luquantun acres industrial park, Contact: Yuan Qingxiang smoke damper: Install the exhaust system piping 70 ° damper, peacetime general was turned off, manual or electric fire dampers open 280 degrees, from smoke role within the exhaust pipe when the temperature reaches 280 ℃ flue is closed within a certain time to meet the fire resistance stability and fire integrity requirements , played the role of the exhaust valve. Dezhou, Shandong Hongxin Air Conditioning Equipment Co., Ltd. is a professional manufacturer of damper manufacturers, wholeheartedly welcome new and old customers! Products Automatic damper characteristics: 70 ℃ temperature sensor action simple dampers, valves instantly close. Closed manually, manually open. DC24V electrical fire dampers, pull solenoid valve closes. Output off signal, interlocking fan. DC24V input signals, the valve opens automatically reset. When the flue gas temperature is below 70 ℃, the temperature sensor can be reused after the automatic reset. Manually adjustable valve blade angle, adjust the air volume five files. Dezhou, Shandong Hongxin Air Conditioning Equipment Co., Ltd.