[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 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, telecommunications No. open exhaust valve, 280-degree blown off, or manually turn off) generally used in exhaust systems, exhaust fan can be installed in the inlet one, when the fire control room by the consumer control is on, when you close the chain also closes the exhaust fan. Exhaust valves, with the three, each unit is called a different check, and 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 just an ordinary party equipment fusing metal damper 280 degrees replaced a fuse that .3 automatic smoke damper (Metro Engineering) fire subway ventilation and air conditioning systems, exhaust valves have automatic fire alarm equipment and gas fire extinguishing system linkage control functions. Each automatic smoke dampers have two independent electric valve 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 - air flow control valve] air volume control valve characteristics (l) more Yefeng off valve over size and amount of ventilation ducts standardized national provisions identical rectangular duct size . (2) air flow control valve leaves off and cis-open, ventilation, air conditioning, air purification system as a regulator. (3) The test measured air volume control valve tightness good, the relative amount of air leakage around 5% regulation performance. Check valve | valves | provided by the Tianjin factory in Tianjin Jinzhong Ji Jinzhong Ji HVAC purification equipment. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) strong, credible, in Tianjin fans, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the group into the brilliant and you work for a better future!