lindab | air valves Valve KVB Technical data Air flow, q [l/s] and [m 3 /h], total pressure drop, Δ p t [Pa], and A-weighted sound power level, L WA [dB], for different settings, a [mm], are shown in the graphs. Sound power level, L Wok [dB], in octave bands is calculated as L WA + K ok . K ok is found in the table below. Ød Valve Centre frequency nom mounted in [Hz] 63 125 250 500 1K 2K 4K 8K Duct 6 2 1 -3 -6 -8 -11 -16 100 Bend 90° 6 2 1 -3 -6 -8 -11 -16 T-piece 6 2 1 -3 -6 -8 -11 -16 Duct 13 -2 -1 -5 -5 -8 -12 -16 125 Bend 90° 13 -2 -1 -5 -5 -8 -12 -16 T-piece 13 -2 -1 -5 -5 -8 -12 -16 160 Duct 14 0 -1 -4 -3 -8 -16 -18 T-piece 14 0 -1 -4 -3 -8 -16 -18 Sound attenuation, Δ L, [dB] Ød Valve Centre frequency nom mounted in [Hz] 63 125 250 500 1K 2K 4K 8K Duct 25 22 21 20 14 18 9 10 100 Bend 90° 30 27 23 17 16 19 12 13 T-piece 25 22 21 20 14 18 9 10 Duct 24 20 17 15 11 12 7 7 125 Bend 90° 29 25 19 12 13 13 10 10 T-piece 24 20 17 15 11 12 7 7 160 Duct 22 18 16 12 14 10 9 8 T-piece 22 18 16 12 14 10 9 8 Measurement of air flow Data is available in a separate brochure. Ø 100 mounted in duct -11 -9 200 100 50 Δ p t [Pa] 20 a [mm] -6 0 6 40 35 30 25 L WA [dB(A)] 10 5 20 10 20 30 40 50 [l/s] 50 100 180 [m 3 /h] q Ø 100 mounted in bend 90° -11 -9 -6 200 a [mm] 0 6 Δ p t [Pa] 100 45 40 50 35 L WA [dB(A)] 30 20 25 10 5 20 10 20 30 40 50 [l/s] 50 100 180 [m 3 /h] q Ø 100 mounted in T-piece -11 -9 -6 200 a [mm] 0 6 Δ p t [Pa] 40 100 35 30 50 25 L WA [dB(A)] 20 10 5 20 10 20 30 40 50 [l/s] 50 100 180 [m 3 /h] q 30 We reserve the right to make changes without prior notice 2014-03-07
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