Dampers for your needs

Butterfly dampers


Butterfly dampers are single-bladed dampers that are best suited for applications where flow isolation is fundamental. Unlike multi-bladed louver dampers, this single-bladed damper is less precise for modulation but is ideal for high-cycle on/off applications as well as harsh environments where abrasion, corrosion and dust loading are present.

Tandem butterfly damper configurations with seal air fan can provide complete isolation when the damper is shut and the seal air fan is in operation.

For applications where internal insulation or refractory is required METCO TECHNOLOGIES INC can assure that the design used will meet industry standards.



Depending on the application and the sealing requirements, METCO TECHNOLOGIES INC. can assist in determining the best seal selection for your damper.

Seal Configurations:

  • Swing through seals
  • Composite tadpole seals
  • Metal-to-metal seals
  • Purging seals

Operator selection is another key decision where METCO TECHNOLOGIES INC. can assist our customers.

Operator Types:

  • Manual
  • Pneumatic actuation
  • Electric actuation
  • Hydraulic actuation

Each of these types of actuation have advantages and disadvantages. Some important information required to assist in the decision process are as follows:

  • Torque required
  • How quickly the damper must be able to modulate or fully open/shut?
  • What is the available power source (instrumentation air, electrical power, etc.)?
  • What are the environmental conditions surrounding the actuator?
  • Is a failsafe system required to force the damper to move to a desired position if power or signal is lost or removed?
  • Power consumption

METCO TECHNOLOGIES INC. can assist you in determining the best option for your needs in order to minimize upfront damper costs as well as operational costs down the road.

Butterfly dampers are available for rectangular, square and circular duct sections.