AXICO ANTI-STALLÂ® Axial flow fan FlÃ¤kt

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FPAC and FPMC axial-flow fans Page 30Dimensions and weights, accessoriesFPAZ-24 SilencerB130 max. 100min. 70FPAZ-33 flexible duct.Flange connection dimensions asEBGG on page 32.PC dia.A o.d.xxPKH1506 holes 14 x 20JG40Weight, kgSize A B C G H J K P Q1 Q2 Q3 Q4c = 0 1) c = 5 1) c = 6 1) c = 8 1)H K080 800 1223 1028 540 1270 400 1130 530 83 109 - -090 900 1223 1128 540 1270 400 1130 586 92 118 127 -100 1000 1223 1228 640 1270 500 1130 630 104 131 137 -112 1120 1800 1348 640 1845 500 1705 696 147 185 193 208125 1250 1800 1478 765 1845 625 1705 760 164 203 212 226140 1400 1800 1328 765 1845 625 1705 845 180 - 228 243JGX - X401) c refers to the central core diameter.See the ordering key for the FPAZ-24 onn page 21Q1, Q2, Q3, Q4 = Total weightFor particulars of other cylindrical and baffle typesilencers - get in touch with your nearest Fläkt WoodsrepresentativeDiffuser FPAZ-25 with sound attenuationL x M dia.E100 PNG dia.A dia.B dia.C dia.D dia.KH16 dia. (2 holes)60PWeightSize A B C D E G Hmin. max.L M N Pkg080 814 1008 1215 1070 1195 1020 400 675 785 16 15 665 60 210090 914 1128 1335 1190 1300 1120 400 755 865 20 15 725 60 265100 1016 1258 1465 1320 1460 1225 400 775 885 20 15 790 60 310112 1136 1412 1615 1470 1480 1345 400 800 950 20 15 865 60 360125 1268 1612 1815 1680 1820 1475 480 955 1105 24 19 965 60 505140 1418 1812 2015 1880 2060 1625 480 1035 1185 24 19 1065 60 605160 1620 2012 2215 2080 2060 1830 480 1120 1270 24 19 1165 60 665180 1820 2240 2455 2320 2180 2030 480 1220 1370 28 19 1285 80 750
FPAC and FPMC axial-flow fans Page 31Acoustic data for FPAZ-24 silencerThe silencer can be delivered with or without central core (see the orderingkey on page 21). The central core is specially suited to each hub diameter.Table 1 below can be used as a guide for selecting a silencer.Table 1Without centralcoreThe particulars specified are applicable to a silencer fitted to the fan outlet.When fitted to the fan inlet, the attenuation will increase by 1 - 2 dB(A).The cange per individual octave band will be somewhat greater.Table 2. Acoustic data for an FPAZ-24 silencerSize *) Attenuation, dBPressureOctave band, mid-frequency, Hz k d dBA constantbbb-c 63 125 250 500 1000 2000 4000 8000 dB(A) z080-0 2 3 10 14 12 11 9 8 11 0080-5 2 3 10 15 22 25 16 12 17 0.30090-0 1 2 8 13 11 10 9 8 10 0090-5 1 2 8 15 17 18 12 10 15 0.19090-6 2 2 9 16 20 21 14 11 16 0.42100-0 0 2 7 12 10 9 9 9 10 0100-5 1 2 7 14 16 12 10 9 14 0.14100-6 1 2 8 16 18 15 11 9 15 0.25112-0 0 3 9 13 11 10 10 10 11 0112-5 1 3 9 15 16 14 12 10 15 0.15112-6 1 3 9 16 17 16 12 11 15 0.24112-8 1 3 11 17 18 18 12 12 16 0.65125-0 0 2 9 11 10 9 9 9 10 0125-5 0 2 9 15 14 12 11 11 13 0.12125-6 0 3 9 15 15 13 11 11 14 0.17125-8 0 3 10 15 16 15 12 11 15 0.35140-0 0 2 9 10 10 9 9 9 9 0140-6 0 3 9 16 13 12 10 10 12 0.12140-8 0 3 9 15 14 12 11 10 13 0.21Table 3. Acoustic data for two FPAZ-24 silencersinstalled in lineWith centralcore1 silencerAttenuation about 10 dB(A) about 15 dB(A)Pressure drop None Low2 silencers Attenuation about 15 dB(A) about 20 dB(A)installed in line Pressure drop None ModerateSize *) Attenuation, dBPressureOctave band, mid-frequency, Hz k d dBA constantbbb-c 63 125 250 500 1000 2000 4000 8000 dB(A) z080-0 2 4 15 19 18 14 12 10 16 0080-5 3 4 15 19 34 30 25 22 21 0.60090-0 2 4 12 18 16 13 12 11 14 0090-5 3 4 12 18 26 24 20 17 20 0.38090-6 4 4 13 18 27 27 23 18 20 0.84100-0 1 3 10 17 14 12 12 11 14 0100-5 2 3 10 17 22 19 16 14 19 0.28100-6 2 4 11 17 24 22 18 15 19 0.50112-0 2 4 13 17 16 14 14 14 15 0112-5 2 4 14 18 23 21 19 17 21 0.30112-6 2 5 15 19 24 23 19 19 21 0.48112-8 3 7 17 21 23 25 19 19 21 1.30125-0 1 4 13 15 14 13 13 14 13 0125-5 1 5 14 19 20 19 17 17 19 0.24125-6 1 5 14 19 20 19 17 17 19 0.34125-8 1 5 16 19 20 21 18 17 19 0.70140-0 1 4 12 14 13 12 12 12 12 0140-6 0 4 14 19 18 17 15 15 17 0.24140-8 0 4 15 18 19 18 16 14 17 0.42* ) bbb = size of silencerc = 0 = without central corec = 5, 6, 8 = with central core for hub diameter 5, 6, and 8 resp.Acoustic data for FPAZ-25 diffuserFPACAttenuation, dBFPMCOctave band, mid-frequency, HzSizek d dBAbbb-c 63 125 250 500 1000 2000 4000 8000 dB(A)080-5 1 3 6 10 14 19 13 8 12090-5 2 3 6 9 14 15 10 6 11090-6 2 3 7 11 16 22 16 10 13100-5 2 4 7 10 14 12 8 4 11100-6 2 4 7 11 16 18 12 7 13112-5 2 4 6 9 12 9 5 3 10112-6 2 4 7 10 14 12 8 4 11112-8 2 4 7 12 17 20 13 8 14125-5 2 5 7 11 12 8 5 3 10125-6 2 5 8 12 15 11 7 4 12125-8 2 5 9 13 18 16 10 6 14140-6 3 5 8 12 13 9 5 3 10140-8 3 5 9 13 17 12 8 4 13160-6 3 5 8 10 10 6 4 2 10160-8 3 5 8 12 12 8 5 2 10180-6 3 5 7 10 8 5 3 1 7180-8 3 5 8 11 9 6 3 2 8Worked exampleGivenDetermine the sound power levels to the inlet and to the outlet duct for anFPAC-7-125-6-8 fan running at a speed of 1470 r/min.Operating point of the fan: total pressure rise of 1388 Pa, flow of 30 m³/sand air density of 1.2 kg/m³. Also calculate the sound power level to the outletduct if an FPAZ-25 diffuser with sound attenuation is installed.SolutionOctave band, mid-frequency, HzTotal63 125 250 500 1000 2000 4000 8000 dB(A)Lwt [dBa(A)] 1) 115 115 115 115 115 115 115 115 -kokb (dB) 2) -16 -14 -7 -6 -3 -7 -12 -14 -Lwb (dB) 3) 99 101 108 109 112 108 103 101 115koka (dB) 4) -13 -14 -7 -6 -3 -7 -13 -17 -Lwa (dB) 5) 102 101 108 109 112 108 102 98 115Acousticdiffuser 6) -2 -5 -8 -12 -15 -11 -7 -4 -FPAZ-25-125-6Lwa downstreamof acousticdiffuser100 96 100 97 97 97 95 94 103 8)1) Lwt = 115 dB(A) in accordance with the example on page 8.2) kokb can be read from the table on page 23.3) Lwb = Lwt + kokb, i.e. line 1 + line 2.4) koka can be read from the table on page 23.5) Lwa = Lwt + koka, i.e. line 1 + line 4.6) The attenuation data can be read from the table above.7) Line 5 + line 68) The total sound power level downstream of the acoustic diffuser isLwt - kd dBA = 115 - 12 = 103. kd dBA can be read from the table aboveSilencer and sound-attenuating diffuserThe sound attenuating properties of sound-attenuating accessoriesand the pressure drops across them are measured directly as a reductionin sound power level and total pressure respectively when theaccessory is mounted at the fan outlet. (A usual but inferior alternativeis to employ a loudspeaker instead of a fan as the sound source).The performance of a sound-attenuated fan has been determined byAMCA 210 - 85 and AMCA 300 - 85 measurement methods.The pressure drop can be calculated from the formula ∆p = z x pd.The value z can be obtained from tables 2 and 3.
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Page 42: Fläkt Woods AB SE-351 87 Växjö,

AXICO ANTI-STALLÂ® Axial flow fan FlÃ¤kt

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