Multilouvre Dampers

DTL Multilouvre dampers are the right solution for larger duct sizes and those applications that demand superior control.

Louvre dampers can be design with parallel blade action and opposed action depending on the customer’s control needs.

DTL Multilouvre Dampers can be manufactured in Carbon Steel or Stainless steel, however for special applications we can utilise any material to suit your requirements such as 800HT, 310S, Alloy 31, Alloy 59…

Various sealing arrangements, including seal air fan, can be used so we can provide the correct sealing efficiency for your application.

DTL bespoke louvre dampers are carefully engineered. Therefore, they can fulfil the most demanding project requirements and specifications.

Multilouvre damper

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Typical Multivane Applications

  • Exhaust systems
  • Air ducting
  • Gas Mixing
  • Tunnel Ventilation
  • Any application that requires isolation or control of gas flows!

Louvre Dampers Specifications

Technical Specifications

  • Pressure: Typically 50Kpa (0.5 barG) however we can design for higher on request
  • Temperature: Typically 600°C (1112°F) however we can design for higher on request


  • Round or rectangular louver damper designs
  • Fully welded body
  • Specially engineered compact design
  • On/off or modulating
  • Typical range from DN300 to DN10000 (other sizes available on request)
  • Pneumatically actuated (Electric actuators also available on request)

Optional Extras

  • Double linkage design
  • Pneumatic cabinet
  • Maintenance free bearings
  • End connections: Flanged to fit ANSI, EN, JIS standards
  • Flexible metallic seals to increase sealing efficiency
  • Seal air for 100% sealing

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