lindab | we simplify construction Formo - Perforated diffuser PKAL Technical data Following PKAL+plenum box data are valid for MBB-S/-E. For MBC and MBE data, go to www.lindQST.com Capacity Air flow q v [l/s] and [m 3 /h], total pressure Δ p t [Pa], throw l 0.2 [m] and sound power level L WA [dB(A)] can be seen in the diagrams. Frequency-related sound power level The sound power level in the frequency band is defined as L WA +K ok . K ok values are specified in charts beneath the dia- grams on the following pages. Quick selection, supply air PKA L + MBB-S duct PKA L Ød 1 100 Ød 2 125 100 160 125 125 125 160 125 200 160 160 160 200 160 250 200 200 200 250 250 250 Δ p t ≥ 50 Pa 30 dB(A) l/s m 3 /h 33 119 39 140 40 144 51 184 58 209 59 212 67 241 77 277 83 299 96 346 118 425 Δ p t ≥ 50 Pa 35 dB(A) l/s m 3 /h 39 140 47 169 48 173 61 220 70 252 70 252 84 302 99 356 100 360 118 425 139 500 Balancing Balancing guide, see the MB installation instruction. Throw l 0.2 Throw l 0.2 [m] can be seen in the diagram for isothermal air, at a terminal velocity of 0.2 m/s. l 0.2 [m] 10 PKA L 160 250 125 200 8 7 6 5 4 3 2 l 0.2 [m] 1 q V [l/s] 30 40 50 60 70 80 100 150 200 300 500 700 100 150 200 300 q V [m 3 /h] 500 700 1000 1500 2000 Correction throw l 0.2 PKA L Ød PKA L Ød 125 125 160 160 200 200 250 250 1 - way 1 - way 2 , 6 2.6 2 , 5 2.5 2 , 4 2.4 2 , 3 2.3 2 - ways 2 - ways 1 , 8 1.8 1 , 7 1.7 1 , 7 1.7 1 , 7 1.7 3 - ways 3 - ways 1 , 4 1.4 1 , 3 1.3 1 , 3 1.3 1 , 3 1.3 Sound attenuation Sound attenuation of the diffusers Δ L from duct to room, including and reflection, see table below. PKA L + MBB-S/-E duct PKA L Centre frequency Hz Ød 1 Ød 2 63 125 250 500 1K 2K 4K 8K 100 125 19 16 7 19 18 18 18 21 100 160 21 16 5 15 17 18 16 19 125 125 18 13 9 20 13 19 18 19 125 160 12 13 8 19 13 16 17 19 125 200 16 11 5 16 13 15 15 17 160 160 17 17 11 19 18 17 20 20 160 200 14 14 7 21 15 16 18 19 160 250 15 15 5 17 13 15 16 18 200 200 15 10 6 16 17 15 19 18 200 250 12 9 5 14 17 15 17 17 250 250 14 8 8 14 16 17 17 18 Air jet distribution l b = Distance from the diffuser to the point where there is maximum dispersal. b v = Depth of the air jet on a vertical plane. b h = Width of the air jet on a horizontal plane. b v b v l b l b l b l = b = 0. 0 6 ,6 × × l 0. l 2 0,2 b v b = v = 0. 0 0 , 5 05 × × l 0. l 2 0,2 h b b h b b h h l b l = b = 0. 0 4 ,4 × × l 0. l 2 0,2 l b l b b h b = h = 1. 1 3 ,3 × × l 0. l 2 0,2 h b b h l b l b l b l b l b l = b = 0. 0 5 ,5 × × l 0. l 2 0,2 b h b = h = 1. 1 0 ,0 × × l 0. l 2 0,2 h b b h b b h h l b l b l b l b l b l = b = 0. 0 5 ,5 × × l 0. l 2 0,2 b h b = h = 0. 0 4 ,4 × × l 0. l 2 0,2 4 Lindab reserves the right to make changes without prior notice 2021-12-10
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