lindab | dampers and measure units UltraLink Controller FTCU Technical data Pressure drop graphs with noise data to ducts for dimensioning The solid curves show the pressure drop, Δ p t , over the damper as a function of flow q, and setting angle α. The dashed curves give the A-weighted sound power data, L WA , in dB to the duct. These curvs are intended for brief comparision. For more accurate calculation, please use the tables. Setting angle ° α = 0° = open blade α = 90° = closed blade Setting angel % α = 100% = open blade α = 0% = closed blade α Example Given Dimension Ø100 Flow 50 l/s Pressure drop 100 Pa Obtained from graph Setting angle 39° Sound power level 57,7 dB (A) ' p t L WA [dB] Ø100 [Pa] 500 300 200 100 50 30 20 0 10 1 D [°] 60 50 40 60 55 50 45 40 20 40 50 q 2 3 45 v 30 20 10 0 80 120 [l/s] 10 15 [m/s] ' p t L WA [dB] Ø125 [Pa] 70 500 300 200 100 50 30 20 12 15 20 D [°] 60 50 40 30 20 60 55 10 50 45 0 40 30 40 50 q 100 120 180 [l/s] 1 2 3 45 10 15 [m/s] v ' p t L WA [dB] Ø160 [Pa] 500 300 200 100 50 30 20 20 1 D [°] 70 60 50 40 30 60 55 50 45 40 35 30 40 50 100 200 q 2 3 45 10 v 20 10 0 300 [l/s] 15 [m/s] 4 DUCT-MC Identification number 17.11.002 Lindab reserves the right to make changes without prior notice 2021-02-16
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