A butterfly valve, also known as a flap valve, is a type of control valve with a simple structure, used for on-off control and flow regulation of media in low-pressure pipelines. Its closing element—a disc—rotates around a central axis to open or close the valve. These valves can regulate the flow of various fluids, including air, water, steam, corrosive media, slurries, oils, liquid metals, and even radioactive substances.
