Implementation arrangements damper is composed of shell, leaves scheduling, back wheel, fuses and other measuring configuration. Each arrangement is to grasp the blade roll 280 ℃ damper by non-metallic fusible sheet and back wheel arrangement, which uses the machine transmission principle, because it is without electricity, gas and other power, in other words the fire dampers can Guarantee in all circumstances play fire protection. Not to mention the waste of resources that do not constitute a condition purify air flow control valve: Principle 2 Structure 3 Technical Data 64654132634132135644444444444444444421521 fan dampers, rich ventilation equipment (certified), the damper is provided by Dezhou rich ventilation plant. Dezhou rich ventilation plant (www.frtfsb.com) (www.frtfsb.com) is an industry leader in Shandong 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.