Lug Butterfly Valve manufacturer in USA Valvesonly is the leading Lug butterfly valve manufacturer in USA. We supply to cities like Kenya, Morocco, Nigeria, and Jordan. A lug butterfly valve is a type of valve that is commonly used in industrial applications to control the flow of fluids. It is a quarter-turn valve that operates by rotating a disc or plate within the valve body to either allow or block the flow of fluid through the valve. The valve gets its name from the lugs or ears that are attached to the valve body, which allow the valve to be bolted in place between two flanges.