Backdraft / Shutters are designed to allow airflow in one direction and automatically prevent reverse flow when the system is off or when pressure conditions change. These gravity-operated dampers open with airflow and close when airflow stops, helping to protect HVAC systems from drafts, wind-driven rain, and unwanted air infiltration. Commonly used in exhaust and intake applications, they are ideal for systems that do not require motorized control.
function similarly to backdraft dampers but include an adjustable start-to-open pressure setting. They are engineered to automatically relieve excess pressure in a system while maintaining a sealed environment under normal conditions. These dampers are ideal for protecting equipment and ductwork by controlling over-pressurization in supply or return air systems, clean rooms, or pressurized enclosures.
Single Thickness or Teardrop-Style Blades Rectangular or Round Construction
Exhaust or intake functions in fast power generation, natural gas or coal-fired power plants and natural gas compressor stations applications, redundant ventilation systems
General exhaust in utility or refinery applications
Pressure relief in steel mill applications
Maximum Temperature:
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Other Features
Bubble tight (zero leak for hazardous locations): Round
and rectangular available.
Refractory-lined dampers (withstand up to 1,800 degrees
Fahrenheit for high-temperature ductwork): Round and rectangular available.
Seal air fan dampers (zero leak for critical paths): Seal air
fan pressurizes damper cavity for no leakage
At Ochoa Industries, we provide custom design solutions for industrial and marine applications. Our specialties include ventilation, noise control, and explosion-proof air conditioning, focusing on performance and safety.
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