lindab | we simplify construction Perforated diffuser - square Technical data ∆ p t [Pa] 10 0 70 50 CKA 2010 2510 3110 4015 5020 6320 30 20 15 10 7 5 3 2 70 100 150 200 300 300 500 700 1000 1 3 4 5 60 55 50 45 40 35 30 25 20 L WA dB(A) 500 700 1000 2000 2000 3000 5000 7000 2 3 4 5 7 10 15 q V [l/s] q V [m 3 /h] 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) CKA h v v max a 0,2 Small diffusion Sound effect level Sound effect level L W [dB] = L WA + K ok h Size 2010 2510 3110 4015 5020 6320 Centre frequency Hz 63 125 250 500 1K 2K 4K 8K v 10 0 4 0 -8 -18 -29 -43 11 1 4 -1 -8 -19 -30 v max -42 14 3 4 -1 -10 -18 -30 -32 10 1 2 0 -8 -17 -27 -42 7 3 2 0 -6 -16 -19 -17 7 3 2 0 -6 -16 -19 -17 Sound attenuation Sound attenuation Δ L [dB] including end reflection. Size Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 2010 12 8 4 2 1 1 1 1 2510 10 6 6 4 2 2 4 3 3110 10 7 3 1 2 1 2 1 4015 9 6 1 1 1 1 1 1 5020 6 4 1 1 1 1 1 1 6320 5 3 1 0 0 0 0 1 b 0,2 2 × a 0,2 a 0,2 2 × a 0,2 Table 1 Correction of the near zone (a 0.2 , b 0.2 ) Under- tem U p n e d r e a r t - ure tem T p i e - r T at r ure T i - T r -K3 -K3 -6K -6K Maximum M v a e x lo im ci u ty m ve m lo / c s ity 0 m .2 / 0 s 0 0 . , 2 2 5 0 0 0 , . 2 3 5 0 0 . , 3 3 5 0 0 0 . , 4 3 0 5 0 0 . , 2 4 0 0 0 0 . , 2 2 5 0 0 0 . , 3 2 0 5 0 0 . , 3 3 5 0 0 0 . , 4 3 0 5 0,40 Mean ve M lo e c a i n ty ve m lo / c s ity 0 m .1 / 0 s 0 0 . , 1 1 2 0 0 0 . , 1 1 5 2 0 0 . , 1 1 7 5 0 0 . , 2 1 0 7 0 0 . , 1 2 0 0 0 0 . , 1 1 2 0 0 0 . , 1 1 5 2 0 0 . , 1 1 7 5 0 0 . , 2 1 0 7 0,20 Correction Co f r a r c e t c o t r ion factor 1,00 0 1 . , 8 0 0 0 0 0 . , 7 8 0 0 0 0 . , 6 7 0 0 0 0 . , 5 6 0 0 1 0 . , 2 5 0 0 1 1 , , 0 2 0 0 0 1 . , 8 0 0 0 0 0 . , 7 8 0 0 0 0 . , 6 7 0 0 0,60 2 Lindab reserves the right to make changes without prior notice 2022-08-17
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