lindab | constant -/variable flow dampers Technical data DAU, DA2EU, DAVU Technical data 1 Sound to duct Sound power level, L W [dB], to duct in octave bands 1–8, 2 63–8000 Hz, as function of diameter, pressure drop and flow. 3 Pressure Ød 1 drop [Pa] Velocity app. 2,5 [m/s] Centre frequency [Hz] Velocity app. 6 [m/s] Centre frequency [Hz] 4 63 125 250 500 1k 2k 4k 8k Flow 15 [l/s] 63 125 250 500 1k 2k 4k 8k Flow 30 [l/s] 5 1000 51 49 44 44 46 49 49 44 56 56 53 53 53 55 55 50 500 45 43 38 38 40 43 43 38 51 51 49 49 49 51 50 46 80 200 37 35 30 30 32 35 35 30 45 45 43 43 43 45 44 40 100 32 30 25 25 27 30 30 25 41 41 39 39 39 41 40 35 50 26 24 19 19 21 24 24 19 – – – – – – – – 6 Flow 20 [l/s] Flow 45 [l/s] 7 1000 56 53 48 48 50 53 54 48 59 59 57 57 57 59 58 53 500 49 46 41 41 43 47 47 42 54 54 51 51 51 53 53 48 100 200 39 37 31 31 33 37 37 32 47 47 44 44 45 47 46 41 100 34 31 26 26 28 32 32 27 42 42 39 39 40 42 41 36 50 26 24 18 18 20 24 24 19 – – – – – – – – 8 Flow 30 [l/s] Flow 70 [l/s] 1000 60 58 52 52 54 58 58 53 64 64 62 62 62 64 63 59 9 500 54 52 46 46 48 52 52 47 59 59 56 57 57 59 58 53 125 200 46 44 38 38 40 44 44 39 52 52 49 49 49 51 51 46 100 40 38 32 32 34 38 38 33 46 46 44 44 44 46 45 40 50 34 32 26 26 28 32 32 27 – – – – – – – – 10 Flow 40 [l/s] Flow 120 [l/s] 1000 62 59 52 52 55 59 60 54 67 67 65 65 65 67 66 61 11 500 56 53 47 47 49 53 54 48 61 61 59 59 59 61 60 55 160 200 49 46 39 39 42 46 47 41 53 53 51 51 51 53 52 47 100 43 40 33 33 36 40 41 35 48 48 46 46 46 48 47 42 50 37 34 27 27 30 34 35 29 – – – – – – – – 12 Flow 70 [l/s] Flow 180 [l/s] 1000 66 63 57 57 59 63 63 58 69 69 66 66 66 68 68 63 1 3 500 59 56 50 50 53 57 57 52 62 62 60 60 60 62 61 57 200 200 50 47 41 41 43 47 47 42 54 54 51 51 52 54 53 48 100 43 40 34 34 36 40 40 35 47 47 45 45 45 47 46 42 50 37 34 28 28 30 34 34 29 – – – – – – – – 14 Flow 110 [l/s] Flow 300 [l/s] 1000 67 64 59 59 61 65 65 60 70 70 67 68 67 69 69 64 15 500 60 57 51 51 53 57 57 52 63 63 61 61 61 63 62 57 250 200 50 47 41 41 43 47 47 42 55 55 53 53 53 54 54 49 100 43 40 34 34 36 40 40 35 49 49 47 47 47 48 48 43 50 35 32 26 26 28 32 33 27 43 43 40 41 40 42 42 37 16 Flow 170 [l/s] Flow 470 [l/s] 1000 69 66 60 60 62 66 67 61 70 70 68 68 68 70 69 65 17 500 61 58 52 52 54 58 59 53 64 64 62 62 62 64 63 59 315 200 50 47 41 41 44 48 48 43 56 56 54 54 54 56 55 50 100 42 40 34 34 36 40 40 35 50 50 47 47 47 49 49 44 50 35 32 26 26 29 33 33 28 – – – – – – – – 18 598 We reserve the right to make changes without prior notice
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