Backdraft Dampers

Permit airflow in one direction and prevent a reverse flow with Kelair's high-quality backdraft dampers

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Kelair Dampers Brochure

Engineered to allow airflow in one direction and prevent reverse airflow

Industrial backdraft dampers fulfill the same mission as their commercial counterparts: they allow airflow in one direction and prevent airflow in the opposite direction. Another way to say this is that these dampers allow for air intake or exhaust/pressure relief while automatically preventing the backflow of air. Kelair’s backdraft ventilation dampers are manufactured to withstand environments with high back pressures and high airflow velocities. These types of industrial backdraft vents are supplied with counterbalanced weights, mounted externally (which are easily field adjustable), they can be gravity balanced, or even paired with actuation if desired.

*Operational testing and calibrating are completed at the factory prior to installation. Questions about installing a Kelair damper at your facility? Contact a Kelair representative near you for answers.

Split Panel Damper

Backdraft Dampers for Essential Ventilation Systems

Kelair backdraft gravity dampers are custom made for ventilation systems and are used in a variety of industries and commercial settings to ensure the quality of circulated air and eliminating contaminants from interfering with the operational efficiency of industrial facilities.

These high-quality backdraft valves can prevent a range of potentially dangerous particulate from entering ventilation systems, heat exchangers, exhaust systems and even solar heating systems. The experienced team at Kelair can design, engineer and manufacture a range of types and styles including butterfly dampers which can be used/installed in both horizontal and vertical positions.

Other Varieties of Dampers

In addition to standard counterbalanced backdraft dampers, we provide other types for specific applications. These include pressure relief dampers, which remain open until a preset pressure is reached, at which point they close. They prevent air from traveling back into the system they are attached to, as well. Barometric dampers are similar to backdraft dampers and are used to ventilate and depressurize areas to prevent damage caused by excessive heat or tension. Our expertise with these and many other types of dampers make us your best choice for the equipment and components you need for your systems.

How do Backdraft Dampers Work?

What is unique about these ventilation dampers is that they use one of the fundamental forces of nature – gravity. When air flows out of the backdraft ventilation damper, gravity is the means by which the damper closes, preventing air which has been contaminated from reentering the system. 

Other Industrial Dampers from Kelair Products

Isolation Valves

Isolation Valves

Isolation valves are typically placed at specific points throughout a pipeline or system. Among the most common spots for isolation valves to be installed include places where pipes branch off in multiple directions or at junctions.

Industrial Ducting

Industrial Ducting

Kelair's custom-designed industrial ductwork is used in various applications, including pneumatic conveying, air pollution control, and industrial ventilation systems.

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 guillotine 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 2100 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 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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