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BTH-B2E • Rectangular sound attenuators express

  • Rectangular
  • Galvanised steel

Standard rectangular sound attenuators with a fixed length of 1000 mm

Application

  • BTH-B2E silencers are designed to reduce sound generated from fans and airconditioning devices with maximum sound attenuation in the 250Hz octave band. The sound attenuation performance of the BTH-B2 silencers with build-in B2 attenuation splitters are superior to classical absorption attenuators on frequencies of 63 to 500 Hz with equal length and width of splitters and equal splitter pattern pitch. In other frequency bands the BTH-B2 silencers are also well adapted to ventilation and air-conditioning system acoustic requirements

  • Silencers with Splitter thickness d=100mm is suitable for smaller air flow rates as well as in the case where high degree attenuation is required in the high frequency range.
  • Standard version silencers with cellulose foil or galvanized steel sheet plates are suitable for velocities up to 20m/s between the splitters

Composition

  • The attenuation housing is made of galvanized sheet steel
  • Splitters with frames of galvanized steel and fillings with highly efficient absorption material are build into the housing
  • Filling exposed surface is protected with cellulose foil
  • They are designed to be incombustible (class A2)
  • B2 splitters are partly covered with galvanized steel strips
  • Strips of galvanized sheet steel or cellulose foil run along the splitter length L
  • The B2 splitter height en length are not interchangeable. The splitter L dimension shall always run in the direction of the propagation of sound

Order example

BTH-B2E BXHXL / d= 100 / n= ...

Explanation

BTH-B2E : Silencer type with B2 Splitters with cellulose foil and sheet steel plates

BXHXL : Width X Height X Length

d=100 : Splitter thickness of 100mm

n= ... : Number of splitters


Attenuation values BTH-B2 Splitter thickness d=100mm

L=1000 mm - d=100
s [mm][Hz]
631252505001000200040008000
40816242825231815
50712202624211613
60610182423191411
66.769172423191411
7059162323191410
7558152323191410
804815222319139
87.54714222319139
903713212319138
1003612212319138

Specifications

  • L = Length in mm
  • s = Distance between splitters in mm
  • Hz = Frequency band in Hertz
  • Sound attenuation capacities D given in dB

Pressure losses BTH-B2 Splitter thickness d=100mm

L=1000 mm - d=100
s [mm]v (m/s)
2468101214161820
40281832507297127161199
50271527436184109138171
6026142438547496122150
66.716132336517091115142
7515122132466382104129
8015112031446079100123
87.51511193043587696118
901510182841567392114
1001410172638526886106

Specifications

  • L = Length in mm
  • s = Distance between splitters in mm
  • Vs = Air velocity between splitters in m/s
  • Pressure drop vallues Dp are given in Pa

Specifications

  • s = Distance between splitters in mm
  • B X H X L = Width X Height X Length in mm
  • d= Splitter thickness 100 in mm
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