[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - Fire exhaust valve installed in the exhaust system] pipeline, the general was usually closed, manual or electric opened fire, from the smoke effect. When the internal temperature of the flue gas exhaust pipe reaches 280 ℃ closed electric control valve, in a certain period of time to meet the fire resistance stability and fire integrity requirements valve, played the role of exhaust valves. 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, each unit different names, some based on its operating temperature is called the exhaust valve air flow control valve, and some based on its use of nature called damper, but only for the common damper device side blown fuse metal into 280 degrees that a .3 automatic smoke damper (Metro Engineering) fire subway ventilation and air conditioning systems, exhaust valves have automatic fire alarm equipment and gas 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. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - damper] smoke dampers are mainly used on duct ventilation and air conditioning systems, usually in a "normally open" state, when the air temperature reaches 70 ℃ When, through the action of the valve automatically closes the fuse. Exhaust port, exhaust valve is mainly set in the pipe exhaust system, or installed in the inlet of the exhaust fan fire, usually turned off, in case of fire, through interaction, automatically turn on the exhaust. Fire damper is installed in the exhaust fan at the entrance and ventilation and air conditioning systems use either system, usually in a "normally open" state, ventilated smoke damper, when the pipeline flow temperatures up to 280 ℃, the valve by fusing temperature fusible metal action is automatically shut down, cutting off airflow to prevent the spread of fire. There are some buildings in fire protection engineering projects to reuse these devices circumstances. Such as Chongqing Tobacco Building is an example. Automatic tobacco smoke damper Chongqing mainly office and commercial buildings, walkways long mechanical exhaust system is set up, each floor is only a smoke partition. Smoke on each floor electric charge of the design of a normally closed damper, each of each exhaust port has designed an electric normally closed exhaust valves, exhaust fan inlet of the fire has designed a normally closed electric smoke damper. Obviously, this design features a waste of existence, but also modules, valves, construction costs of waste. Recommendation: 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 Close the damper, the control module to the general monitoring module. Both methods achieve the same fire code requirements, and the actual control is also very reliable. Regulating valve, Tianjin Jinzhong Ji integrity for 15 years (certified), Hebei, Tianjin Jinzhong Ji valve provided by HVAC purification equipment. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) is a leader in Tianjin, 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. In the group leadership with the staff warmly welcome all inquiries negotiations to create a better future for the base.