Exhaust valves, with the above, each unit different names, some based on its operating temperature exhaust valves called duct dampers, some based on its use of nature called damper, but only for the common damper device side blown fuse metal into that kind of 280 degrees. 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 outlet damper control signal, respectively, by EMCS, gas consumption monitoring system round dampers, control signals are DC24V ± 10% signal. Each automatic smoke dampers have six independent feedback signal (three open dampers in place, three off place) feedback signals are normally open dry contact signal. 1. The construction and installation of fire dampers can edit and fan, exhaust fan interlock. 2. The operation of the valve mechanism side should be not less than 200mm of headroom to facilitate maintenance. 3. The valve must be checked before installation of the valve operating mechanism is intact, the action is flexible and effective. The damper should be installed in the duct segments close to the wall or floor, the fire dampers on both sides of the partition wall from the wall surface should not exceed 200mm, dampers and pipe insulation material on both sides of each 2.0m wide should be non-combustible material. 5. The damper should set up a separate hanger to prevent pipe deformation affecting its performance in case of fire. 6. damper fuse should be installed in a large piece of the side facing the fire risk. Duct damper | damper | Rich ventilation provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (#) 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 Plumper ventilation equipment into the brilliant and you work for a better future!