lindab | we simplify construction Damper - circular DCT Technical data Pressure drop diagram and sound data for dimen- sioning. The solid curves indicate the total pressure drop Δ p t over the damper as a function of the volume flow q and the blade angle α . The broken curves indicate the A-weighted sound effect level L WA , in dB to the duct. Example: Dimension: Volume flow: Pressure drop: Ø100 60 l/s 100 Pa The following can be pbrained from the diagram: Blade angle α: Sound effect level: 32 o 63 db(A) Measuring method for sound: Sound data has been measured by the Swedish National Testing and Research Institute (SP) with reference to ISO 5135 and EN/ISO 3741. Blade angle α: 0 o = Open damper. 90 o = Closed damper. Pressure drop Δ p t L WA [dB] Pressure drop Δ p t L WA [dB] Ø80 Sound power level L WA [dB] [Pa] 60 500 300 200 100 50 30 20 5 35 10 1 2 Setting angle α [°] α [°] 50 40 30 75 20 70 65 60 10 55 50 0 45 40 20 30 q 40 50 3 45 10 v 75 [l/s] 15 [m/s] Ø100 Sound power level L WA [dB] [Pa] 60 500 Setting angle α [°] α [°] 50 40 30 300 200 100 50 30 30 20 8 10 75 20 70 [dB] 65 L WA 60 10 55 50 45 35 40 20 30 40 50 q 0 120 [l/s] 1 2 3 45 10 15 [m/s] v Ø125 Sound power level L WA [dB] [Pa] 70 60 500 300 200 100 50 30 40 20 12 15 20 30 Setting angle α [°] α [°] 50 40 75 30 70 65 20 60 55 50 10 45 40 50 q 0 100 180 [l/s] 1 2 3 45 10 15 [m/s] v Ø160 Sound power level L WA [dB] [Pa] 70 60 500 300 200 100 50 30 20 20 35 30 30 40 50 Setting angle α [°] α [°] 50 40 30 80 75 20 70 65 60 10 55 50 0 45 40 100 q 200 300 [l/s] 1 2 3 45 10 15 [m/s] v Pressure drop Δ p t Pressure drop Δ p t L WA [ dB] 2 Lindab reserves the right to make changes without prior notice 2020-09-22
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