lindab | we simplify construction Perforated diffuser - installation CVA Technical data ∆ p t [ Pa] CVA 100 70 50 30 20 15 10 7 5 4 20 30 40 50 100 150 200 0.5 2 3005 5005 6005 6008 8008 50 45 40 35 30 25 20 L WA dB(A) 70 100 150 200 300 400 500 700 1 3 4 5 q V [l/s] 300 q V [m 3 /h] 1000 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) h v v max Small diffusion Sound effect level Sound effect level L W [dB] = L WA + K ok b 0,2 2 × a 0,2 Size 3005 5005 6005 6008 8008 Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 7 -2 -2 1 -8 -17 -27 -38 7 -3 -1 1 -7 -17 -29 -36 11 -4 -1 1 -7 -17 -29 -37 12 -4 2 1 -9 -20 -31 -31 10 -4 2 1 -9 -19 -30 -43 Sound attenuation Sound attenuation Δ L [dB] including end reflection. Size 3005 5005 6005 6008 8008 Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 18 13 9 4 1 0 0 1 15 11 8 2 2 1 0 0 15 10 4 2 0 0 0 1 12 8 3 2 0 0 0 0 12 8 3 1 0 0 0 0 a 0,2 2 × a 0,2 Table 1 Correction of the near zone (a 0.2 , b 0.2 ) Under- temperature T i -T r -3K -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 2021-05-18
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