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Due to its unique structure, the dome valve is usually the preferred valve in pneumatic conveying. The shell and disc materials of dome valves are often made of ductile iron, stainless steel, special wear-resistant materials, and steel lined fluoroplastics. Sealing ring materials often include chloroprene rubber, silicone rubber, fluororubber, and EPDM rubber. Dome valve is a special valve that relies on compressed air to achieve a tight sealing effect, suitable for handling dusty gases and erosive bulk materials, such as discharge valves, process valves, directional valves, reactor valves, fluidized bed combustion chamber valves, high-pressure gas reactors, and pressure reducing devices used in warehouses/bins.