Weather louvres serie 200 - Koolair

9General- As an accessory the weather louvres 210TA incorporate abirdscreen or an insect screen.Birdscreen Insect screenThe pressure loss of 210TA louvres for a given air flow rateand dimensions can be determined from the selectiontable in the following mannerAir flow rate......................... 5000 m 3 /hDimensions in mm (L x H)..... 1000 x 650Face velocity (V f) = 5.000 / (1000 x 650 en m 2 ) • 3600 =2,1 m/sPressure loss at intake for louvre with birdscreen:21Pa.Pressure loss at discharge for louvre with birdscreen:24Pa.12,5 x 12,5mm.1,6 x 1,6 mm.- Can be built as a single module upto maximumdimensions of 3000 x 2000 mm (width x height). Forwidths above 1000 mm central reinforcements areincorporated as shown below.L < 1m.L >1m. < 2m.L >2m. < 3m.Example of selectionFor a known air flow rate which should pass through thelouvre at, for example, a velocity of 5 m/s (corresponding toapproximately 2 to 2.5 m/s face velocity), the louvredimensions can be obtained by using the quick selectiontable.Example : For 500 m 3 /h a 210TA of 1000 x 600 or other withequivalent areaObviously, the effective area will increase for higher height/length ratios, due to the inactive zones at the first and lastlouvre blades, i.e. the effective area of a 500 x 1000 mm(L x H) louvre will be higher than for a 1000 x 500 mm size.