lindab | we simplify construction Perforated diffuser - circular Technical data ∆ p t [Pa] CCA 150 100 70 50 1207 1607 30 20 15 10 7 5 3 2 30 40 50 70 100 150 200 300 150 200 300 500 700 1000 0.5 1 2 1 2 34 2010 2510 3115 4020 5020 6320 60 55 50 45 40 35 30 25 20 L WA dB(A) 500 700 1000 q V [l/s] 2000 3000 2000 3000 5000 q V [m 3 /h] 10000 a 0.2 [m] 3 45 7 10 b 0.2 [m] 5 7 10 15 20 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 Oval diffusion CCA h v v max a 0 2 ,2 Circular diffusion (factory setting) b 0,2 Sound effect level Sound effect level L W [dB] = L WA + K ok Size 1207 1607 2010 2510 3115 4020 5020 6320 Centre frequency Hz 63 125 250 500 1K 2K 8 -1 1 1 -9 -17 10 -1 1 1 -8 -17 10 -1 3 0 -9 -17 7 -1 3 0 -7 -18 13 2 3 -1 -8 -17 13 2 3 -1 -7 -16 7 3 2 0 -6 -16 7 3 2 0 -8 -16 h v 4K 8 v K max -28 -40 -29 -33 -27 -40 -28 -41 -29 -27 -28 -43 -19 -17 -20 -17 Sound attenuation Sound attenuation Δ L [dB] including end reflection. Size Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 1207 19 14 5 3 2 1 2 1 1607 16 12 4 1 2 1 2 2 2010 12 8 4 2 3 2 2 2 2510 12 8 5 2 1 1 1 1 3115 11 8 3 2 1 1 2 2 4020 9 6 1 1 1 1 1 1 5020 6 4 1 1 1 1 1 1 6320 5 3 1 1 0 0 0 1 b 0,2 a 0,2 a 0,2 a 0,2 2 Table 1 Correction of the near zone (a 0.2 , b 0.2 ) Under- temperature T i - T 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 2022-08-17
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