lindab | dampers and measure units Constant-/variable flow damper DAU Dimensions B 122 Ød 1 20 65 l Description Constant flow damper with manual setting of one flow DAU is a constant flow damper, which facilitates balancing of ventilation systems and gives correct flow from the start. The unit compensates e.g. connection and disconnection of system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc. Ø 80–315 fullfills pressure class A in closed position. Fulfils tightness class C. There is a separate assembly, measuring, balancing and maintenance instruction for this product. Technical data Flow setting The flow is set by loosing the center nut and via the knob turning the scale arrow so it points at the wanted flow on the scale. Then the center nut is tightened. Tightness class Ød 1 l B m nom [mm] [mm] [kg] across closed blade 80 246 122 1,35 0 100 246 122 1,40 0 125 246 135 1,65 0 160 246 170 1,85 0 200 246 210 2,26 0 250 284 260 3,35 0 315 334 325 4,75 0 DAU is available with a 45 mm external insulation and an outer sheet metal shell for lower sound radiation to the sur- roundings. It is then called DALU. 122 Center nut Scale arrow Ordering example Product Dimension Ød 1 DAU 125 Ød 1 nom 80 100 125 160 200 250 315 B l [mm] 246 246 246 246 246 284 334 B [mm] 170 190 215 250 290 340 405 l Tightness class m across closed [kg] blade 2,35 0 2,50 0 2,90 0 3,45 0 4,06 0 6,05 0 8,60 0 DUCT-MC Identification number 17.11.002 Lindab reserves the right to make changes without prior notice 1 2020-09-10
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