Butterfly valves are used for flow control of powder and granular raw materials poured with their own weight. Butterfly valves are usually installed under bunkers, silos, screw or other type conveyors, or to block pneumatic conveying channels. There is a circular disc that can rotate 90O inside the butterfly valve. When the Butterfly Valve is closed, the disc becomes perpendicular to the flow and the sealing gasket on the inner surface of the valve frame comes into contact. The sealing gasket in the butterfly valve provides 100% tightness when the butterfly valve is in the closed position. Butterfly valves are designed in two types as single and double flanges. They are offered with o-ring channel and gasket opened on flange bodies for maximum tightness. Single flanged butterfly valves are designed for flexible bellows and similar connections in the throat area. Double flanged butterfly valves with the same upper and lower flanges are designed to be used in systems that can be fixed to each other. Due to their special design and engineering materials used, they represent a particularly cost-effective yet most efficient solution.
