Product Principle installed central air-conditioning duct system works extremely fluxing temperature control, by the action of gravity and spring mechanism closes the valve. When a fire occurs, the flame duct invasion, high temperature melting fusible alloy valves, or to make memory alloy deformed the valve automatically closes for the duct and the fire district occasions throughout the exhaust system exhaust valve installed in the pipe road, usually the general was closed, manual or electric opened fire, from the smoke effect. When the internal temperature of the flue gas exhaust pipe reaches 280 ℃ closed within a certain period of time to meet the fire resistance stability and fire integrity requirements, from the exhaust valve function. Smoke damper normally closed (NC, open telecommunications number, 280 degrees blown off, or manually turn off) generally used in exhaust systems, exhaust fan can be installed at the inlet of a control to open the control room when the fire extinction, When the chain can also be turned off to close the exhaust fan. Exhaust valves, with the three damper wholesale, each unit is called different proof damper, some based on its operating temperature is called the exhaust valves, and some based on its use of nature called damper, but just an ordinary party equipment fusing metal damper 280 degrees fuse replaced kind. 3. Automatic smoke damper (Metro Engineering) fire, smoke valve subway ventilation and air conditioning systems have automatic fire alarm equipment and gas fire extinguishing system linkage control functions. Each automatic smoke dampers have two independent electric control signal, respectively, by EMCS, gas consumption system to monitor, control signals are DC24V ± 10% signal. Each automatic smoke dampers have six independent feedback signal (three open place, three off place) feedback signals are normally open dry contact signal. Over the years, the factory has fully absorbed the well-known manufacturers of technical and management personnel, the use of standardized international advanced automated production lines and equipment operations, the implementation of modern enterprise management system, and pursuing an open damper humane management, market-oriented, positive build marketing network and after-sale body, combined with China's national conditions and innovate, to develop a new generation of international advanced level of professional products. Our plenum is made of high quality materials and superb technique developed from the damper installation, low resistance, air volume, good insulation hose insulation properties, high strength, high mounting precision, factory product range rich, complete specifications, factory outlets, price concessions. can be customized, 100% quality assurance, integrity first-class service, received praise at home and abroad users. Damper wholesale | Jinzhong damper | Rui Xincheng Rui Xincheng air conditioning provided by the Texas Air Conditioning Equipment Co., Ltd .. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Rui Xincheng air conditioning and you hand into the brilliant, for a better future!