1. The fire dampers, fire control valve, normally open, 70 degrees is closed, usually installed in the duct through the firewall, fires off the role, you can set the output electrical signal, smoke more than 70 degrees when the valve is closed, the chain of delivery (fill ) off the fans; 2. Wuhan smoke fire smoke damper valve price, normally open, 70 degrees closed, with one, but more than a telecommunications signal input, control room by eliminating remote control is off, generally used for peacetime air, fire Wind up the common duct system, you can control when the fire off unneeded air make room; 3. damper, 280 degrees fuse closed, normally open, smoke damper wholesale Wuhan, Wuhan output electrical signal quality wholesale damper, which and a similar, but different fusing temperature, generally used in fire exhaust pipe through the firewall, the flue gas temperature exceeds 280 degrees automatically blown off, you can turn off the exhaust fan chain. Installed in the central air-conditioning duct system, the working principle is easy to control the temperature of fusion of gold, the use of gravity acting and spring mechanism to close 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 throughout the occasion. Wuhan high-quality damper wholesale, fire dampers, fire dampers Liyuan Han Wei Wei provided by Wuhan Han Liyuan heating equipment Limited. Wuhan Han Wei Li Yuen-being of Equipment Co., Ltd. (www.whhwly.com) strong, credible, in Wuhan, Hubei fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Wuhan Han Wei Li Yuen and you hand into the brilliant, for a better future!