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SAR-G • Circular sound attenuators

  • Circular
  • Galvanized steel

Circular sound attenuator in galvanized steel with insulation shell thickness of 50 or 100 mm enveloped in a glass film for air speeds up to 20 m / s

Attenuation values according to DIN EN ISO 7235 (63, 125, 250, 500, 1k, 2k, 4k, 8k [Hz])

Application

  • For noise reduction in round air ducts
  • Reducing noise produced by fans
  • Reducing flow noises from flow regulators or other channel components
  • Can be used as a damper to prevent sound transfer trough the ducting between rooms

Composition

  • Circular silencers are designed with an external galvanised duct system
  • Insulation with thickness 50 mm (SAR-G50) or 100 mm (SAR-G100)
  • Inner casing is made of perforated sheet steel
  • The void between the two is filled with sound-absorbing non-combustible mineral wool according to DIN4102 A2, specific mass> 20 kg / m³, building material class A2
  • Mineral wool certified according to RAL GZ 388
  • Connection to circular air ducts according to DIN EN 1506 or DIN EN 13180
  • Class D airtight connection with EPDM rubber according to DIN EN 12237
  • Airtight connection class D with EPDM rubber according to DIN EN 12237

Mounting

  • The attenuators should be mounted using duct suspension clamps, type OBMC, around the duct connection DN

Order example

SAR-G50 100 (200 mm) L=300mm
Explanation:
SAR-G = Type of sound attenuator
50 = Thickness of insulation in mm
100 = Connection diameter in mm
200 = Outer diameter (insulation shell included) in mm
300 = Length in mm

Sound attenuation values

I = 50 mm
   [dB] ∆ PL [ζ / m]
DND [mm]L [mm]63 Hz125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 Hz[kg]
8018030046513151612151.70.374
80180600491326303225242.9
801809004112239454837334.1
8018012004133150505050425.2
100200300387102537361220.286
100200600491119334540193.3
1002009004101528405044274.6
10020012004102037485048345.9
12522430034711151416112.30.22
125224600461019283325183.8
125224900491427425035245.3
12522412004111736465046316.8
14025030034711161415102.70.163
14025060047918343224164.5
140250900491226414834216.2
14025012005122044505050278
1502503002361116141592.70.176
15025060036917302924134.5
150250900471225384432176.2
1502501200591837475044218
1602503001251115141482.70.163
16025060025816262623104.5
160250900351123353930126.2
1602501200461530445038147.9
1802803001251113121283.10.14
180280600147.516242318105.1
180280900351121333523127.1
1802801200361426434629149
2003003000251211101083.40.123
20030060003716222013105.5
200300900251019303116117.6
2003001200261222424120139.8
22431530012410119.5763.80.108
2243156001371521181186.4
2243159002410182826159.58.9
22431512002512223834191211.4
2503553001138109444.80.095
250355600126131915867.7
25035590023917262113810.6
25035512002412213427171013.5
280400300113797335.50.081
280400600126121814858.9
28040090023916252012712.2
28040012002412214126161015.6
30040060001.5511151164.58.70.074
30040090023816231810712
300400120023410213424151015.3
31540060001410127449.20.069
3154009001261521158712.6
3154001200137212722131016
355450600114101163310.80.061
3554509001261418126514.7
35545012001371924179718.5
400500600114101151212.20.052
400500900125131583216.5
40050012001271620114320.8
45056060011491042213.90.048
450560900125131463218.8
4505601200227161985323.8
5006006001138923214.80.039
500600900225121434220.1
5006001200226161845325.3
I = 100 mm
   [dB] ∆ PL [ζ / m]
DND [mm]L [mm]63 Hz125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 Hz[kg]
802803004131316365050243.10.374
802806004152133475050505.2
802809004183050505048507.2
8028012005203950505050509.2
1003003003121422334844213.50.286
1003006004141829395048465.7
1003009005172336465050507.9
100300120061928435050505010.1
12531530021218222522191240.22
1253156003131731333429196.6
1253159004142034435039259.2
125315120051421375050503211.9
1403553002101521222018114.80.163
1403556003111529353329177.9
14035590041319324149412311
140355120051321365050503014
1503553002.291121191816104.80.176
1503556003101426283130157.9
15035590041117303949431910.9
150355120051220395050502214
1603553002782016161594.80.163
160355600381224263030107.9
16035590041016283748451310.9
160355120051119334750501614
1804003002682014151495.60.14
1804006003811221252622119.2
18040090041016263842311312.7
180400120051219304750391916.3
2004003001571912141295.60.123
200400600271117232214119.1
2004009003915233235171312.6
200400120041218264645282216.2
224400300157141212985.60.108
22440060036111722191299
2244009004815243630161212.5
224400120051018294636231816
25045030014681210546.60.095
25045060035101620169710.7
2504509004614243024141014.7
25045012005717314532181318.8
28050060035101519159712.20.081
2805009003614232823131016.9
28050012004717304431171321.5
30050060024101318158612.10.074
300500900351321272212916.7
30050012004717283729161221.2
31550060024101217148612.80.069
315500900251320252111917.4
31550012003717273328151222.1
3555606001391112754150.061
35556090025111619148720.4
35556012003614222620119.525.7
4006006001410121476516.20.052
40060090025121920148822
40060012003613232718111027.8
450630600148121475519.10.048
4506309002511161686526.3
450630120036122123138833.4
500710600146121364422.80.039
5007109003612201886531.1
500710120037122325118739.4
560800600137131154426.60.034
5608009003511201575436.3
56080012003611201886546
600800900349171054435.20.031
60080012003411201565444.6
630800900238166333380.03
63080012002310191043347.6
71090090023913523244.50.029
7109001200231017933355.6
800100012003310157334700.023

  • I = Insulation jacket thickness in mm
  • DN = Nominal connection diameter of silencer in mm
  • D = Outside diameter in mm
  • L = Length in mm
  • Δ Ptot = Δ PL x [(ρ x v²) / 2] x L
    • Δ Ptot = Total pressure loss in Pascal
    • Δ PL = Average total pressure loss coefficient ζ/m
    • P = Specific weight = 1.2041 kg/m³
    • v = Air velocity in m/s
    • L = Length in meters

Pressure loss

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