Dampers are used in ducts to adjust the airflow and direction. It prevents air from automatically flowing backwards or adjusts the airflow in order to maintain the temperature and moisture in each room. Dampers can be controlled manually or automatically. It is made from special thick galvanized steel. Customers can custom order them as required. The design and manufacturing processes are completed by machines controlled by computers for the highest precision. All processes adhere to SMACNA and ASHRAE standards. At Duct Asia Engineering Co., Ltd., we can design dampers made from steel, stainless steel, galvanized steel, and PVC. Options include manually controlled models, models with an electric actuator, models with a pneumatic actuator, butterfly dampers, louver dampers, and radial vane dampers.