Chassis assembly point is that these main exhaust fan, we must be reasonable based on the instructions, the only way to fully demonstrate its performance Shandong damper, we the fans do not understand what are assembled, Please feel free to contact us. 280 degrees dampers must be shut down at high temperatures, it is a signal back to the controller via Handan damper input module, then control exhaust fan stops. To prevent the fire from spreading to other fire district through exhaust pipes. On the exhaust fan inlet manifold should be set when the flue gas temperature exceeds 280 ℃ can turn itself off when the smoke damper and exhaust fan should be interlocked so that the flue gas exhaust pipe when the temperature exceeds 280 ℃ closed on their own dampers to prevent spread to other parts of pyrotechnics. Otherwise, close only exhaust fan, can not prevent the spread of smoke and fire through the pipeline. Shandong damper | Rich ventilation equipment (certified) | damper provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.