4. duct segments damper should be installed in close proximity to the wall or floor of the damper damper portfolio, fire from both sides of the partition wall surface of the wall should not be greater than 200mm gravity dampers, fire dampers on each side 2.0m range pipes and insulation should be used within a non-combustible material. 5. The damper should set up a separate hanger to prevent pipe deformation of its performance in case of fire. 6. The damper of the fuse link should be installed in the larger side facing the fire risk. Damper, smoke damper settings on the ventilation and air conditioning system piping distribution damper set damper, smoke damper located in the exhaust system pipe to prevent toxic gas heat transfer fire, and the fire spread and toxicity increased. 280 ℃ damper _ Yanda air conditioning (certified) _ Puyang County damper provided by Wu Yan of air-conditioning plant. Wu County Yanda air-conditioning plant (www.wcydkt.com) (www.wcydkt.com) Shandong Dezhou, heat, refrigeration and air conditioning equipment leader, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. In Yanda air conditioning leadership with the staff warmly welcome all inquiries negotiations to create Yanda air conditioning better future.