Round Backdraft Dampers | McMaster-Carr

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195 Products

Duct and Fittings

Crush-Resistant Spiral Duct and Fittings

A spiral seam gives this duct greater strength and rigidity than standard duct.

Standard Duct and Fittings

No need for clamps or connectors—duct and fittings have a male end that is slightly smaller than its female end for simple assembly.

Quick-Disconnect Duct and Fittings

Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.

Chemical-Resistant Duct and Fittings

Made of PVC plastic to withstand acids, alkalies, salts, and other corrosive vapors and fumes.

Blast Gates

Control the flow of air and material through duct systems.

Automatic Blast Gates

More convenient than other blast gates, these automatic gates open and close in sync with dust collectors, fume exhausters, and other machines.

Easy-Install Blast Gates

Often added to existing systems, these gates install without disassembling duct. Also known as half gates.

Self-Cleaning Blast Gates

Use in dust collection systems. The slide pushes through the top of the gate to clear debris.

Furnace Draft Dampers

Also known as barometric dampers, these dampers improve furnace performance by automatically opening and closing to maintain consistent airflow despite changing environmental conditions.

Fire-Rated Airflow Dampers

In the event of a fire, these dampers automatically stop airflow through duct.

Automatic Airflow Dampers

Save energy and increase comfort by heating and cooling only the areas that need it.

Wall Vent Caps

Sloped Roof Vent Caps

Gas and Chimney Vents

Exhaust Pipe Caps

Keep rain and debris out of vertical exhaust pipe with these caps that open with slight pressure from exhaust.

Chimney Vent Caps

Cover chimneys to reduce downdrafts and prevent obstructions from entering.