Stack Damper

To minimize heat loss from the boiler and to prevent the ingress of rainwater, we offer a range of stack isolating dampers which are designed for use with stacks from 300mm diameter to in excess of 7m diameter.

The stack isolating damper can be either a butterfly, multilouvre or twin flap design and can incorporate an automatic pressure relieving system to prevent over pressurization and damage to the gas turbine.


  • Exhaust stacks


  • From DN300 up to DN10000
  • Max. 0,5 Bar (higher on request)
  • Up to 600°C (till 1250°C on request)
  • Round or rectangular design
  • Fully welded body
  • Pressure relieving
  • On/off or modulating
  • Specially engineered compact design
  • Electrically actuated


  • Carbon or stainless steel fabricated
  • Rigid ledge or flexible seal
  • Pneumatic actuators on request
  • Pneumatic cabinet
  • Maintenance free bearings
  • Rain channels
  • End connections: Flanged to fit ANSI, EN(DIN)-, JIS standards


Industrial brochure

Get a complete overview of our industrial valves and accessories.


DTL - Damper valves

Read more about our damper valves for many different industries
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