Louver Dampers

Kelair Louver dampers modulate and isolate the flow of air or gas in a system

Industrial Dampers that feature quick actuation, control and isolation

Kelair Louver Dampers or Multi-Vane Louver Dampers consist of several blades mounted parallel across a duct. They modulate the flow of air and gas in dry or wet conditions or can isolate and shut them off altogether. Opposing blade type louvers allow the flow to increase or decrease. Parallel blades allow for complete shut off and are particularly useful where space is restricted.

These dampers are frequently motorized or can be manually adjusted for flow control.  Louver dampers control gas or air flow, detour flow into separate systems, or isolate a process for inspection and maintenance.  They are particularly useful in applications where quick actuation and space constraints are major issues.  Louver dampers are adaptable, can be lightweight, compact and have low leakage to the outside environment. 

  • Operational testing and calibrating are completed at the factory prior to installation.
Louver Damper Manufacturing

Product Features & Specifications

  • Sizes of Kelair’s Louver Dampers Range from 14″ to 132″
  • Process Temperatures up to 1900 degrees F
  • Round, Square or Rectangular Configurations
  • Stainless Steel or painted carbon steel construction
  • Shutoff Options:
    • 99% (compression seals)
    • 98% (jamb seals)
    • 95% (metal bar seats)
    • 90% (swing-thru; control & balancing)
  • Ball bearings standard up to 400 degree
  • Carbon sleeve bearings standard over 400 degrees F
  • Shaft packing glands standard
  • Actuation Options of: Manual, Electric or Pneumatic with spring return and failsafe available.
  • Standard designs to 1 PSI & 4000 FPM process air with higher available
Kelair Louver Damper

Other Dampers from Kelair Products

Butterfly Dampers

Butterfly Dampers

Butterfly dampers used by Kelair 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 both light, and heavy-duty industrial ventilation for high volume flow control, and isolation applications. This damper modulates the flow of air and gas in dry or wet conditions or can shut them off altogether.

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 or Tee Dampers are used to redirect air stream 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. This unique design helps reduce heat loss 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. 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. 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.

Stack Cap Dampers

Stack Cap Dampers

Kelair's Stack Cap Dampers isolate the stack opening to prevent foreign material from entering and conserve warmth when the stack is shut down. The dampers deliver accurate airflow and isolation at high temperatures, reducing the stack effect.

Find a Kelair Representative

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

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