GLS Multi-Louver Damper

Multi-louver damper valve solution for industrial air and gas applications.


Multi-Louver damper valves

Gasport GL Louver Damper GLS Multi-Louver Damper

Louver dampers are made as a welded assembly construction and usually made for modulating gas applications. They are composed of one or many parallel blades that work together as a mechanical system when actuator operates the damper. Our engineered louver dampers are made to work in both flow directions as a bidirectional design. Parallel blades offer tighter sealing and are primarily used for balancing or isolating duct flow. Opposed blade operation is used to maintain a straight gas flow through the ductwork and provides better modulating capability. The seat can be done as a swing-through blade without seat or the disc can directly make contact with a metal plate ensuring a maximum leak of 0.5%Kv value. Soft braided sealing option can also be supplied on request, providing a more tightness damper closing.

For applications where a full 100% tightening is requested, an air sealing system with double parallel blades design can be made. For such cases, the seal is done in the space between blades while injecting air at a higher pressure than the one in the conduit. This system creates a pressurized chamber preventing gases from escaping.


Customized valves

We design and manufacture customized solutions for each customer and need.

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Directives and standards

  • PED 2014/68/UE A-4 P-3.
  • 2014/34/UE CAT 3 ZONE 2 AND 22.


  • Working temperatures up to 1000ºC.
  • Working pressures up to 0.5bar.
  • Sizes up to 2000X2000mm.
  • Robust and reliable design.
  • Taylor-made solutions.
  • Modulating service.
  • Flange drillings to main international standards.
  • Different End connection types.
  • Epoxy coating for carbon steel components.
  • ISO 5211 flange drillings for interchangeable actuators.
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Related industries

Over time, PARAVALVES team has had the chance to analyze not only the design of these valves but the specific applications they are used in as well in a cost effectiveness mind. From Biogas to Petrochemical applications, we’re confident the PARAVALVES Gasport Series Damper valves will be a great solution for the following industries:


Can we help you with anything?

If you need a quotation for any of our products, have any questions, suggestions or want to distribute our valves, we will be more than happy to answer you.