Product Principle installed central air-conditioning duct system works extremely fluxing temperature control damper module, use the force of gravity acting and spring mechanism closes the valve. When a fire occurs, the flame duct invasion, 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 hundred percent direct selling, welcome to order! I have a number of professional, innovation, production and experienced technical personnel proof damper, force, quality sound system damper wholesale, mainly producing aluminum outlet, such as wood and plastic outlet, especially aluminum diffuser back outlet, single (double) activities outlet, waterproof blinds, ceiling manholes, electric outlet as well as valves, air flow control valve, fire dampers, exhaust valves, muffler, etc. has become the leading products of the enterprise. Our innovative product design, various styles, beautiful appearance, reliable quality, variety. Products sold Cheong country and exported to Southeast Asia and Europe and other regions. Quality of products by customers and industry praise Introduction FYH-SFVD common type of fire and smoke exhaust valve PFHF-SFD with fire dampers are usually installed in ventilation and air conditioning systems deliver on the return air duct and the horizontal branch pipe. The main components: body, valves, bushings, actuator. 150 ℃ damper _ Rui Xincheng air conditioning (certified) _ Baotou damper provided by Rui Xincheng Air Conditioning Equipment Co., Texas. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.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 . Rui Xincheng conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.