Transmission node Material requirements: ① key shaft and pin type parts in 304 stainless steel; ② U-shaped fork, rocker, internal support and bearing with steel (ZG45) casting making, surface spray treatment; ③ Seal ring temperature 250 ℃ / 1h or 150 ℃ / 1h; ④ bearing joints made of copper alloy making, electric air valve, and a self-lubricating function; ⑤ bearing caps, bearing sleeve and closures and other machined parts using cutting mode with 45 # steel making, Xianning damper, bright nickel plated; ⑥ standard fasteners are zinc coated. ⑦ transmission node (anchor) should be connected to the internal support channel / beam, valve plant, to ensure that there is sufficient connection node strength and stability. Smoke dampers should be able to meet different installation conditions may be vertical or horizontal installation and adaptation of the wall or duct installation, and should ensure that the blade along the flow direction can be self-sealed. Body at least three sides marked with red spray paint flow direction of the arrow. Smoke dampers used in steel, profiles should comply with the relevant provisions of the draft standard valve _ Wuhan Han Wei Li Yuen (certified) _ provided by the Wuhan-Xianning damper being of Equipment Co., Ltd. Li Yuen Wai. Wuhan Han Wei Li Yuen-being of Equipment Co., Ltd. (www.whhwly.com) is a leader in Wuhan, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In Wuhan Han Wei Li Yuen leadership with the staff warmly welcome all inquiries negotiations to create Wuhan Han Wei Li Yuen better future.