lindab | dampers and measure units Shut-off damper DTMU Technical data Pressure drop graphs with noise data for dimensioning The solid curves show the pressure drop, Δ p t , over the damper as a function of the flow q, and setting angle α . The dashed curves give the A-weighted sound power data, L WA , in dB to the duct. Example Given Dimension Ø100 Flow 60 l/s Pressure drop 200 Pa Obtained from the graph Setting angle 32° Sound power level 63 dB (A) Δ p t L WA [dB] Ø125 [Pa] 70 500 300 200 100 50 30 20 12 15 20 α [°] 60 50 40 75 30 70 65 20 60 55 50 10 45 40 30 40 50 q 0 100 180 [l/s] 1 2 3 45 10 15 [m/s] v Δ p t L WA [dB] Δ p t L WA [ dB] Ø80 [Pa] 500 300 200 100 50 30 20 5 1 60 35 10 2 a [°] 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] Ø160 [Pa] 500 300 200 100 50 30 20 20 70 60 35 30 30 40 50 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 Δ p t Δ p t L WA [dB] Ø100 [Pa] 500 300 200 100 50 30 30 20 8 10 1 α [°] 60 50 40 30 75 20 70 [dB] 65 L WA 60 10 55 50 45 35 40 20 30 40 50 q 0 120 [l/s] 2 3 45 v 10 15 [m/s] Ø200 [Pa] 70 500 300 200 100 50 α [°] 60 50 40 30 75 80 70 65 60 20 55 50 45 10 40 30 35 0 20 30 40 50 100 q 200 300 475 [l/s] 1 2 3 45 10 15 [m/s] v DUCT-MC Lindab reserves the right to make changes without prior notice 2 Identification number 17.11.002 2020-08-31
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