Nordfab Quick-Fit blast gates are designed to focus the vacuum pressure to a dust extraction system for maximising the dust collection. These manual units feature a robust design to reduce air loss & friction and aluminium / galvanised steel construction for strength & corrosion resistance. They are integrated with a rolled-edge design, on the ends, providing easy connection with a barrel type clamp and a gasket, under the clamp, to seal the joints tightly. Selected models further come equipped with an automatic control facility operated by double-acting compressed air cylinders with standard 120 V control circuit and 75 psi (min) air pressure; suitable for dust, mist & fume collection applications. Choose from a wide range of these dampers available in duct sizes ranging from 4 to 16 inches on Raptor Supplies.