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. Install the valve must be checked before the valve operating mechanism is intact dampers, the action is flexible and effective. Installation of fire dampers on both sides of the partition wall of the duct segments 4. damper damper should be installed close to the wall or floor surface should not be greater than 200mm from the wall damper quotes, fire dampers on each side of the range of 2.0m piping and insulation materials 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. Supply air flow control valve - round butterfly dampers, fire protection equipment, gathered here numerous suppliers, buyers, manufacturers. _ Rich ventilation dampers produced (certified) _ Changzhi damper provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) (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, the maximum limits to meet customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.