... ,safety valves,slurr valves ,diaphragm valves ,check valves,and gate valves. The nominal diameter is DN40--DN 4000mm with ... humidifier ,and sludge discharge machine ,various metal and non-metal compensators and mufflers Structural features Air operate Fan Shape Gate Valve ... operate, simple structure, long life and other characteristics. Scope Air operate Fan Shape Gate Valve Widely used in mining, ...