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 backdraft dampers allow for air intake or exhaust/pressure relief while automatically preventing the backflow of air. Kelair’s backdraft dampers are manufactured to withstand environments with high back pressures and high airflow velocities. These types of industrial dampers can be supplied with counterbalanced weights, mounted externally that are easily field adjustable or they can be gravity balanced.
- Operational testing and calibrating are completed at the factory prior to installation. Question about installing a Kelair backdraft damper at your facility? Contact a Kelair representative near you for answers.
Backdraft Dampers for Essential Ventilation Systems
Kelair backdraft dampers are custom made for complex ventilation systems and are used in a variety of industries and commercial settings to ensure the quality of circulated air and eliminating contaminants from interferring with the operational efficiency of commercial facilities.
These high quality dampers 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 stules including butterfly dampers which can be used/installed in both horizontal and vertical positions.
How do Backdraft Dampers Work?
What is unique about backdraft dampers is that they use one of the fundamental forces of nature – gravity. When air flows out of the damper, gravity is the means by which the backdraft damper closes, preventing air which has been contaminated from reentering the system.
Other Industrial Dampers from Kelair Products
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.
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
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 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.
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 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.
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 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.