https://www.senotay.com/dust-conveying-system/electric-ventilation-butterfly-valve.html The electric ventilation butterfly valve is mainly used in the dusty cold air or hot air gas pipelines for ventilation, environmental protection projects in metallurgy, chemical industry, building materials, power stations, glass and other industries, and is used as a gas medium to regulate flow or cut off devices. Features of Electric Ventilation Butterfly Valve: It is designed and manufactured with a new type of structure welded with a midline plate and a short structure steel plate. It has a compact structure, lightweight, large circulation, avoids the influence of high-temperature expansion, and is easy to operate. Long service life, can be installed in multiple stations, not affected by the media flow