Butterfly Dampers

Our most economical and best selling dampers

Kelair's Butterfly Dampers can be used in a wide range of applications

Kelair’s Butterfly dampers were developed in response to our customers’ desire for an economical industrial damper which could be used in most applications. Appropriate for flow control and low leakage in systems that regulate clean air, gas or light particulate, Kelair’s Butterfly dampers can also be engineered to process highly corrosive, abrasive or high heat air flows. These types of dampers can be a cost-effective means to control and isolate in air duct systems.  Kelair’s Butterfly dampers are applicable for open-closed service or flow control balancing. Discover the variety of industrial-grade damper products available at Kelair

  • Operational testing and calibrating are completed at the factory prior to installation.
What is a Damper?

Product Specifications & Features

  • Sizes from 6″ to 144″
  • Process Temperatures to 1800 degrees F
  • Round, Square or rectangular configurations
  • Stainless steel or carbon steel construction
  • Shutoff Options:
    • 99% (Tadpole Seals)
    • 97% (Metal Seat)
    • 90% (Swing-thru; Control & Balancing)
  • Ball bearings standard up to 400 degrees F
  • Carbon sleeve bearings standard over 400 degrees F
  • Shaft packing glands standard
  • Actuation Options: Electric, Pneumatic with double acting or spring return and failsafe available or Manual.
  • Open/Closed or modulating control
  • Standard Designs to 1 PSI & 4000 FPM process air with higher available
What is a Damper?

Other Dampers from Kelair Products

Butterfly Dampers

Butterfly Dampers

Butterfly dampers have the simplest design and the fastest turnaround. They are the economical choice for applications ranging from light duty to heavy duty and low temperature to high temperature.

Louver Dampers

Louver Dampers

Kelair's Louver Dampers are applicable for light duty industrial ventilation to heavy duty, high volume flow control and isolation applications. Parallel or opposed blade, outboard bearings and linkage, adjustable packing glands and double skin airfoil vanes are all standard on louver dampers from Kelair.

Slide Gate / Guillotine Dampers

Slide Gate / Guillotine Dampers

These types of slide gate or gullotine dampers are used primarily as shut off devices. Kelair's rugged, heavy duty designs are available round or square with sizes from 4" up to 96" making them an ideal solution for industrial applications.

Diverter & Tee Dampers

Diverter & Tee Dampers

Diverter Dampers also called Tee Dampers are used to redirect air stream (hot gas or otherwise) from one outlet to another. These types of dampers are widely used in incineration systems to divert process air and gas to the incinerator or by-pass to the atmosphere.

Refractory Dampers

Refractory Dampers

Kelair’s Refractory dampers are manufactured to withstand temperatures up to 1900 F in corrosive, particulate and/or process gas environments. Refractory dampers from Kelair help reduce heat loss to surroundings and provide erosion protection for the frame.

Inlet Vane Dampers

Inlet Vane Dampers

Inlet Vane Dampers work with fans and blowers to enhance their performance by controlling air volume and fan shut-off. They can be mounted to the fan inlet to conserve power at reduced airflow. These types of dampers reduce fan pressure without reducing speed. Kelair’s design boasts no external linkage, eliminating pinch points and damage to the assembly.

Backdraft Dampers

Backdraft Dampers

Kelair’s Backdraft dampers are engineered to allow airflow in one direction and prevent reverse airflow. They are typically wall or roof mounted and applied to mechanical HVAC ventilation systems. Backdraft dampers control airflow in ventilation systems either to modulate or to shut off moving air through a fan opening when it is turned off. Backdraft dampers can utilize pneumatic or electric actuators or be gravity controlled.

Stack Cap Dampers

Stack Cap Dampers

Stack Cap Dampers or Stack Isolation Dampers both isolate the stack opening to prevent foreign material from entering when not in use and conserve warmth when the stack is shut down or during maintenance. Kelair’s Stack Cap dampers deliver accurate air flow and isolation at high temperatures and high volumes, reducing the stack effect when offline thereby protecting ductwork from the elements.

Find a Kelair Rep

Our Manufacturer Sales Representatives across the country or our factory sales personnel will be pleased to discuss your specific application and available options with you.

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