Jalousie damper Dimensions Installed in round duct: Alternatively installed in round duct: JSM fitted with plate and ILU. Product name: JSMILU. LORU 40 A 40 C 110 40 B ∅ d 100 50 40 α lindab | dampers and measure units JSM Technical data Pressure drop The values are applicable for dampers installed in ducting systems. When they are free flowing, the loss of speed (p d = dynamic pressure) corresponding to the frontal area should be added. The angle of aperturea refers to the dimension sheet on the previous page. [Pa] 1000 500 200 p s 100 50 20 α = 10° 20° 30° 40° 50° 60° 70° 80° 90° v 0,1 p d 0,2 0,5 1 0,1 0,5 1 2 5 10 20 [m/s] 5 10 50 100 300 [Pa] v = air velocity, m/s p d = dynamic pressure, Pa P s = static presure, Pa Sound data Sound level L W (ref. 10 -12 W) is applicable for dampers with an area of A=1 m². For other damper sizes (x) m², the follow- ing applies: L Wx = L W 1,0 + 10 · log x Adjustment values for the individual octave bands are added to the sound levels recorded and are set out in the below table. dB 100 90 80 70 L W 60 50 1000 600 400 200 100 60 40 20 40 0,1 0,2 0,5 1 2 5 10 20 v, m/s Lindab reserves the right to make changes without prior notice 2 2018-03-06
Download PDF file