lindab | dampers and measure units Shut-off damper DTU 1 Property 2 3 The blade is set via a knob in a pro- tective cup. The setting of the blade is read ×××× against an embossed scale at the rim × × × × 4 of the cup. The blade is locked with two screws, × × × × type Pozidriv (PZD2). 5 The blade has reinforced locking with a sturdy wing nut. × The blade is reinforced. ××× 6 The blade is additionally reinforced. With sturdy handle. × ××× With additionally reinforced handle. × 7 With reinforced stop beads. The axle is reinforced. ××× × 8 The damper can be delivered pre- ××××× pared for motor. Is then called DTHU. The damper can be delivered with electric motor of On/Off-type without × × × × × 9 spring return. Is then called DTBU. The damper can be delivered with electric motor of On/Off-type with ×××× 10 spring return. Is then called DTBCU. The damper can be delivered with 11 pneumatic actuator of On/Off-type with spring return. Is then called DTPU. ×××× 12 13 14 15 16 17 18 Ø 80–315 Ø 400 Ø 500 Ø 630 Ø 710-1000 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 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 graph Setting angle 32° Sound power level 63 dB (A) Δ p t Ø80 [Pa] 500 300 200 100 50 30 20 5 1 60 35 10 2 a [°] 50 40 30 75 20 70 65 L WA [dB] 60 10 55 50 0 45 40 20 30 q 40 50 3 45 10 v 75 [l/s] 15 [m/s] Δ p t 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] 268 We reserve the right to make changes without prior notice
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