Double Flap Valve allows material to flow, while preventing the back flow of air or gas that is critical in many conveying systems. These devices are commonly used wherever dry solids need to be moved between areas of differing air pressure, including ash handling. Typical Double Flap Valve equipment Double Flap Valves can handle material like Fly Ash, Sawdust, Lime, Cement, Clinker, Sinter and sand.This Flap Valve can be motorized, pneumatic & gravity operated.