lindab | we simplify construction Perforated diffuser - corner Technical data ∆ p t [Pa] CQA 150 100 70 50 30 20 15 10 7 5 1207 1607 2010 2510 3115 4020 60 55 50 45 40 35 30 25 20 3 2 30 40 50 70 100 150 200 300 150 200 300 500 700 1000 1 2 2 3 4 5 7 L WA dB(A) 500 700 1000 2000 3000 3 4 5 10 15 q V [l/s] q V [m 3 /h] 5000 a 0.2 [m] b 0.2 [m] Recommended maximum volume flow. The near zone is given at an under-temperature of -3 K to a maximum terminal velocity of 0.20 m/s. Conversion to other terminal velocities - see table 1, correc- tion of the near zone for -3 K and -6 K respectively. Nearzone Large diffusion (factory setting) CQA h v v max a 0,2 Small diffusion b 0,2 Sound effect level h Sound effect level L W [dB] = L WA + K ok v Size Centre frequency Hz v max 63 125 250 500 1K 2K 4K 8K a 0,2 1207 8 -3 3 0 -7 -15 -27 -35 1607 11 -1 5 -2 -8 -16 -28 -34 2010 11 0 5 -2 -7 -16 -28 -40 2510 11 2 5 -2 -7 -15 -29 -39 3115 11 3 5 -2 -8 -17 -29 -38 4020 12 4 2 0 -8 -16 -30 -41 2 × a 0,2 Sound attenuation Sound attenuation Δ L [dB] including end reflection. Size Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 1207 18 13 5 3 3 2 2 2 1607 15 11 3 1 2 2 2 2 2010 11 7 3 8 5 5 7 7 2510 10 6 5 7 5 4 4 5 3115 9 6 5 4 4 5 5 7 4020 8 5 2 3 2 3 3 3 Table 1 Correction of the near zone (a 0.2 , b 0.2 ) Under- temperature T i i - T r r -K3 -6K Maximum velocity m/s 0, . 20 0, . 25 0, . 30 0, . 35 0, . 40 0, . 20 0, . 25 0, . 30 0, . 35 0, . 40 Mean velocity m/s 0, . 10 0, . 12 0, . 15 0, . 17 0, . 20 0, . 10 0, . 12 0, . 15 0, . 17 0, . 20 Correction factor 1, . 00 0, . 80 0, . 70 0, . 60 0, . 50 1, . 20 1, . 00 0, . 80 0, . 70 0, . 60 2 Lindab reserves the right to make changes without prior notice 2020-10-07
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