Exhaust valve lindab | air valves KVG 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 4 -4 -6 -7 -6 -4 -13 -18 100 Bend 90° -1 -1 -3 -3 -5 -7 -16 -27 T-piece 7 0 -2 -7 -6 -5 -11 -21 125 Duct T-piece 6 -1 -3 -6 -7 -4 -16 -27 7 0 -2 -7 -6 -5 -13 -24 160 Duct T-piece 5 -5 -4 -6 -3 -7 -18 -30 5 1 -5 -8 -6 -4 -18 -29 200 Duct 3 -2 -5 -6 -2 -9 -16 -26 Tolerance ±6 ±3 ±2 ±2 ±2 ±2 ±2 ±3 Sound attenuation, Δ L, [dB] Ød Valve nom mounted in Duct 100 Bend 90° T-piece 125 Duct 160 Duct 200 Duct Setting a [mm] -12 0 8 -12 0 8 -12 0 8 -17 -6 5 -18 5 6 -20 0 20 Centre frequency [Hz] 63 125 250 500 1K 2K 4K 8K 23 19 14 14 12 11 13 16 22 16 9 8 6 6 6 10 22 16 9 7 5 5 4 8 25 20 15 13 12 12 12 15 24 17 11 7 6 7 6 11 24 17 11 6 5 5 5 11 23 19 14 14 12 11 13 16 22 16 9 8 6 6 6 10 22 16 9 7 5 5 4 8 21 15 12 10 8 8 11 14 20 14 10 7 5 5 6 7 19 14 9 6 4 4 4 8 19 14 10 8 7 9 13 13 18 13 8 6 5 5 10 8 18 12 7 5 4 4 10 6 17 14 9 8 8 10 11 12 17 12 7 5 5 6 8 8 15 12 6 5 3 4 8 7 Measurement of air flow Data is available in a separate brochure. Δ p t [Pa] Δ p t [Pa] Δ p t [Pa] Ø 100 mounted in duct -9 200 100 50 20 a [mm] -5 0 5 8 12 40 35 30 L WA [dB(A)] 10 5 20 10 50 q Ø 100 200 mounted in bend 90° -9 20 30 40 50 [l/s] 100 180 [m 3 /h] a [mm] -5 0 58 12 100 40 35 50 30 20 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 T-piece 200 100 50 20 a [mm] -9 -5 0 5 8 12 45 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 We reserve the right to make changes without prior notice 33 2014-03-07
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