Non-return or positive pressure dampers. AR-200

Non-return or positive pressure dampers. AR-200

Non-return or positive pressure damper, model AR-200, KOOLAIR, with flat fins of 1.5-mm thick galvanized plate and U-frame of 2-mm galvanized plate with zinc-coated steel shafts that turn in nylon bushings. The unit includes zinc-coated steel counterweights and galvanized steel housing for wall recessing and absorption of the counterweight length.