Product Principle: Editing fan dampers installed in the central air-conditioning duct system works extremely fluxing temperature control, by the action of gravity and spring mechanism closes the valve. When the fire broke out fire dampers, fire intrusion duct, high temperature melting fusible alloy valves, or to make memory alloy deformed the valve automatically closes for the duct and the fire district occasions throughout Dezhou Plumper ventilation plant is Professional production of central air-conditioning equipment manufacturers supporting the end. Products in full accordance with the national standard, standard production line, advanced equipment, technology and stability. Normally open type smoke damper damper wholesale, 280 degree fuse closed, normally open fire valve, output electrical signal, this and a similar, but different fusing temperature, generally used in fire exhaust pipe through the firewall, flue gas temperature over 280 degrees automatically blown off, you can turn off the exhaust fan interaction. Our attention to credibility, and ensure the quality of products, focusing on small profits, rapid delivery, and after-sales service system, a lot of new construction in recent years to provide air-conditioning equipment, from product quality and after-sales service, users have been satisfied. Flue damper | Rich ventilation equipment (certified) | Cangzhou damper provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (#) is a leader in Dezhou, fans, ventilation equipment, over the years, the company is 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.