lindab | we simplify construction Damper - rectangular DJP Technical data Damper dimensioning When dimensioning the dampers inherent noise from the dampers and their regulating properties (damper char- acteristics) must be taken into consideration. If excessively large dampers are used, the working area (angle of rotation) at given V min and V max may be so limi- ted that regulation does not function satisfactorily. Efforts must be made to use damper dimensions that result in the largest possible working areas (angles of rotation). Due to regulation accuracy, working areas with damper angles > 75° should be avoided. The diagram shows the damper position at given pressure losses and volume flows. Example: The example shows the working area for a XXX x XXX mm damper, which works between V max =1,236 m 3 /h; Δ p = 50 Pa and V min =309 m 3 /h ; Δ p = 100 Pa. The diagram shows damper positions XX° and XX°. Correction of sound effect level for other damper sizes Air volume Turning angle Pressure drop Pa 1000 700 500 400 300 Louvre damper DJP 0,05 m 2 0,10 m 2 200 150 0,25 m 2 m 2 100 70 50 40 30 m 2 1,00 0,50 20 150 200 300 400 500 700 1000 2000 3000 500 700 1000 2000 3000 5000 10000 Air volume 5000 20000 l/s 10000 m 3 /h 0 10 20 30 40 50 60 70 80 90 50000 Turning angle 2 Lindab reserves the right to make changes without prior notice 2020-09-23
Download PDF file