Valve lindab | air valves KDPF Technical data Air flow, q [l/s] and [m3/h], 1 total pressure drop, Δpt [Pa], and A-weighted sound power level, LWA [dB], for different Ø 100 Number of open holes settings, n [number of open holes], are shown in the graphs. 2 3 4 200 6 8 10 12 2 Measurement of air flow Data is available in a separate brochure. 100 Δ pt [Pa] Sound power level, LWok [dB], in octave bands is calculated as LWA + Kok. 50 Kok is found in the table below. 35 30 3 25 LWA [dB(A)] 4 Ød Diffuser Centre frequency nom mounted in [Hz] 63 125 250 500 1K 2K 4K 8K 100 Duct – -5 -4 -3 -3 -8 -13 -16 Sound attenuation, ΔL, [dB] 20 10 5 20 5 10 20 30 40 50 [l/s] 50 100 q 180 [m3/h] 6 Ød Valve Number Centre frequency 7 nom mounted of open [Hz] in holes 63 125 250 500 1K 2K 4K 8K 100 Duct 2 – 23 22 24 18 16 15 10 6 – 19 16 15 12 8 10 7 8 12 – 19 15 12 9 5 5 3 9 10 11 12 13 14 15 16 17 18 We reserve the right to make changes without prior notice 49
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