[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product --280 degrees] damper damper choice points 1. The main control parameters for the selection and specification. 2. damper suitable for ventilation and air conditioning systems, in addition to public buildings, kitchen hood system with dampers, operating temperature of 150 ℃, the general ventilation and air conditioning systems with fire dampers operating temperature of 70 ℃. 3. Picture damper damper for ventilation, air conditioning or exhaust system piping, basic functions and scope of Table 1. 4. The selection of valve should pay attention to the function of the valve manual control valve, normally open or normally closed, shut down automatically open, close the open hand, manual reset, signal output, remote control and other requirements. 5. If the valve and fan interaction should be used with double micro-switch device. 6. The valve should be steel blade thickness of 2 ~ 6mm valve, the valve is non-combustible material, rotating parts should be corrosion-resistant metal material dampers and flexible rotation. Shall not be less than the thickness of the valve housing 2mm. Yi Rong parts shall comply with recognized standards of the fire department. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - exhaust valve exhaust valve]: For use either branch duct smoke partition, exhaust valve is normally open, and because no fire zone certainty, the exhaust valve should be open again be closed, it should adopt electric. Either a smoke partition fire, the fire control center in the area can have a smoke exhaust valve opens, the other partitions exhaust valves closed. If the smoke partition not use either branch duct, the duct that is in parallel with a dedicated primary exhaust pipe only, then the exhaust valve on the exhaust manifolds are normally closed, and with the smoke detectors linked electromagnetic valve manual reset . General non-use either the exhaust valve exhaust system is also true. Flue damper, damper Tianjin, Tianjin Jinzhong Ji damper manufacturer provided by Tianjin 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!