PRODUCTS
EShop-number
Password
Welcome to SK Sales
 

SAR-G • Circular sound attenuators

  • Circular
  • Galvanized steel
  • Spigot

Circular sound attenuator in galvanized steel with insulation shell thickness of 50 or 100 mm wrapped 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 circular air duct systems.
  • Reducing noise produced by mechanical components.
  • Can be used as a silencer / sound attenuator to prevent sound transfer via 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
  • Complete with optional ‘safe’ seal but also suitable for direct connection to spiral duct / fittings
  • 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 OBDC, around the duct connection DN

Order example

SAR-G 50 100 L=600mm
Explanation:

SAR-G = Type of sound attenuator
50 = Thickness of insulation in mm
100 = Connection diameter in mm
600 = Length in mm

Explanatory Notes

  • 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

Sound attenuation values

50 mm Insulation
   [dB] ∆ PL [ζ / m]
DND [mm]L [mm]63 Hz125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 Hz[kg]
100200600491119334540193.30.286
1002009004101528405044274.6
125224600461019283325183.80.22
125224900491427425035245.3
15025060036917302924134.50.176
150250900471225384432176.2
16025060025816262623104.50.163
160250900351123353930126.2
20030060003716222013105.50.123
200300900251019303116117.6
250355600126131915867.70.095
25035590023917262113810.6
300400600025111511658.70.074
30040090023816231810712
31540060001410127449.20.069
3154009001261521158712.6
             
100 mm Insulation
   [dB] ∆ PL [ζ / m]
DND [mm]L [mm]63 Hz125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 Hz[kg]
3555556001391112754150.061
35555590025111619148720.4
4006006001410121476516.20.052
40060090025121920148822
500700600146121364422.80.039
5007009003612201886531.1

Pressure loss
Mobile WebsiteAbout UsDisclaimerPrivacy policyCookie policy

Requesting information. Please wait a moment...