Our Volume Control Damper controls the airflow remotely. It is designed for use in heating, ventilating and air conditioning systems. The joints are welded and protected by aluminium spray coating to prevent rusting. The blades are coupled by toothed nylon gears which provide opposed blade operation. The foam gasket is sealed across the blade edges to minimize air leakage between the blades. The flanged edges of the Volume Control Damper are supplied un-drilled as standard.