The air flow control valve in the unity of the whole blade width four specifications, Linyi smoke damper, leaf-shaped diamond-shaped double blade, smoke damper timely delivery, between blades made of soft lap, smoke damper leading technology, thus Good airtight performance. Tip: One method is to exhaust port of the exhaust valve and the module cancel, vent louvers into a single layer; second method is to put a normally closed damper on each electric charge of the smoke changed to normally open 280 degrees Close the damper, control module replaced general monitoring module. Both methods achieve the same fire code requirements, and actual control is also very reliable. Linyi smoke damper | Rich ventilation equipment | 2015 New smoke damper by Dezhou rich ventilation plant. Linyi smoke damper | Rich ventilation equipment | 2015 New Shandong Dezhou rich smoke damper ventilation plant (www.frtfsb.com) (www.frtfsb.com) this year introduced a new upgrade, the above picture is for reference only, please You call Tel picture on this page or to obtain the latest information, Contact: Zhang.