Butterfly valve

leverpneumaticelectric

WAFER and LUG butterfly valves are products, like ball valves, equipped with a 90° rotation. Chosen for their reduced thickness and ensuring a small footprint, this type of component offers an excellent quality/price ratio. Speaking of composition characteristics, WAFER and Lug butterfly valves are made up of four main elements: a valve body built in different materials, a disk that allows the opening and closing of the passage of the fluid through the valve, a central shaft that guarantees the 90° movement of the disk thanks to a specific lever or pneumatic or electric actuators and finally a sealing gasket called sleeve, made with NBR, BUNA, EPDM, VITON or PTFE type elastomers. WAFER and LUG butterfly valves reach considerable dimensions, from DN 40 to DN 1600. They are components equipped with a ten-position manual lever, capable of partializing (if and when necessary) the passage of the fluid up to DN 200. They are also equipped with gear reducers that act thanks to a handwheel of size that varies depending on the DN. The handwheel also allows the partial opening and/or closing of the liquid. In situations where automatic management is chosen, moreover, it will be sufficient to remove the lever and add some pneumatic, electric and hydraulic actuators to the valves. But what is the difference between WAFER butterfly valves and LUG butterfly valves? The WAFER butterfly valve is mounted between two flanges with long screws that will make the valve adhere to the two flanges, creating a single totally sealed element.