Motorized /Manual volume control damper Material: Galvanized sheet/Stain steel Flange width: 30mm Depth: 200mm Size is done according to customer’s requirement. Features: It is a volume controller installed in the air duct of air-conditioning and ventilation systems. The open degree of blades is controlled by electric motor. The material could be sprayed galvanized sheet ,stainless or aluminum alloy. Size: can be adjusted as customer’s requirements. Color: follow customer’s requirements. Application: It is applied to air conditioning and air purification projects of small and medium-sized chemical fertilizer, light industry, metallurgy, textile and senior civil construction, industrial plant.