AE-DF series motorized butterfly valves are widely used in the area of air-conditioning, heating, ventilating, and water treatme AE-DF series motorized butterfly valves are widely used in the area of air-conditioning, heating, ventilating, and water treatment for industrial enviromental protection,etcSpecifications Output Torpue50NM100NM200NM400NM600NM1000NMAction time15/30S15/ ...