Metso Neles Attenuator, A Plate
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Neles A Plate Attenuator

Brand: Metso
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The noise created by throttling gas or steam can be effectively reduced by mounting a Neles A-Plate Attenuator downstream of the control valve. 

The A-Plate is a fixed restriction which divides the pressure drop between the valve and the plate to minimize the noise generated. 

Noise attenuation is achieved by the specific hole geometry of the attenuator plate, which is the result of intensive computational and experimental studies. 

When used in conjunction with Metso patented Q-Trim, an attenuation of up to 25 dBA can be achieved.
Features
  • Improved attenuation through unique hole geometry
  • Compact design
  • Rigid, solid construction, no separate parts to break out
  • Large hole diameter compared to conventional low noise devices
  • Minimal pipe changes required when mounting into existing systems

Specifications

Brand

Capacity

  • 7 to 7,960 Cv

Flange Size - 1-1/2" (DN40)

  • 1-1/2" (DN40) - 150# (ASME)
  • 1-1/2" (DN40) - 600# (ASME)
  • 1-1/2" (DN40) - PN 10 (ASME)
  • 1-1/2" (DN40) - PN 40 (ASME)

Flange Size - 1" (DN25)

  • 1" (DN25) - 300# (ASME)
  • 1" (DN25) - 600# (ASME)
  • 1" (DN25) - JIS 10K (ASME)
  • 1" (DN25) - JIS 20K (ASME)
  • 1" (DN25) - PN 10 (ASME)
  • 1" (DN25) - PN 40 (ASME)

Flange Size - 10" (DN250)

  • 10" (DN250) - 150# (ASME)
  • 10" (DN250) - PN 10 (ASME)
  • 10" (DN250) - PN 16 (ASME)
  • 10" (DN250) - PN 25 (ASME)

Flange Size - 12" (DN300)

  • 12" (DN300) - 150# (ASME)
  • 12" (DN300) - 300# (ASME)
  • 12" (DN300) - JIS 16K (ASME)
  • 12" (DN300) - JIS 20K (ASME)
  • 12" (DN300) - JIS 30K (ASME)
  • 12" (DN300) - PN 25 (ASME)
  • 12" (DN300) - PN 40 (ASME)

Flange Size - 14" (DN350)

  • 14" (DN350) - 150# (ASME)
  • 14" (DN350) - JIS 16K (ASME)
  • 14" (DN350) - JIS 20K (ASME)
  • 14" (DN350) - PN 16 (ASME)

Flange Size - 16" (DN400)

  • 16" (DN400) - 150# (ASME)
  • 16" (DN400) - 300# (ASME)
  • 16" (DN400) - PN 10 (ASME)
  • 16" (DN400) - PN 16 (ASME)
  • 16" (DN400) - PN 25 (ASME)

Flange Size - 18" (DN450)

  • 18" (DN450) - 150# (ASME)

Flange Size - 2" (DN50)

  • 2" (DN50) - 300# (ASME)
  • 2" (DN50) - 600# (ASME)
  • 2" (DN50) - JIS 30K (ASME)
  • 2" (DN50) - PN 10 (ASME)
  • 2" (DN50) - PN 40 (ASME)

Flange Size - 20" (DN500)

  • 20" (DN500) - 150# (ASME)
  • 20" (DN500) - PN 10 (ASME)

Flange Size - 24" (DN600)

  • 24" (DN600) - 150# (ASME)

Flange Size - 28" (DN700)

  • 28" (DN700) - PN 10 (ASME)
  • 28" (DN700) - PN 16 (ASME)

Flange Size - 3" (DN80)

  • 3" (DN80) - 300# (ASME)
  • 3" (DN80) - 600# (ASME)
  • 3" (DN80) - JIS 30K (ASME)
  • 3" (DN80) - PN 10 (ASME)
  • 3" (DN80) - PN 40 (ASME)

Flange Size - 32" (DN800)

  • 32" (DN800) - 300# (ASME)

Flange Size - 4" (DN100)

  • 4" (DN100) - 150# (ASME)
  • 4" (DN100) - 300# (ASME)
  • 4" (DN100) - JIS 30K (ASME)
  • 4" (DN100) - PN 25 (ASME)
  • 4" (DN100) - PN 40 (ASME)

Flange Size - 6" (DN150)

  • 6" (DN150) - 150# (ASME)
  • 6" (DN150) - 300# (ASME)
  • 6" (DN150) - JIS 10K (ASME)
  • 6" (DN150) - JIS 30K (ASME)
  • 6" (DN150) - PN 10 (ASME)
  • 6" (DN150) - PN 16 (ASME)
  • 6" (DN150) - PN 25 (ASME)
  • 6" (DN150) - PN 40 (ASME)

Flange Size - 8" (DN200)

  • 8" (DN200) - 150# (ASME)
  • 8" (DN200) - 300# (ASME)
  • 8" (DN200) - 600# (ASME)
  • 8" (DN200) - JIS 16K
  • 8" (DN200) - JIS 20K (ASME)
  • 8" (DN200) - PN 10 (ASME)
  • 8" (DN200) - PN 16 (ASME)
  • 8" (DN200) - PN 25

Materials of Construction

  • Carbon Steel
  • Stainless Steel

Media

  • Gas
  • Steam

Size

  • Minimum Hole: 0.2" (5 mm)

Documentation

Data Sheets

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