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Includes side vent panels or openings that allow for the flow of the air to the outside with minimal restrictions to exhaust airflow
Diameters: 2”to 12"
with the airflow and close when the system is not exhausting
Available in sizes to 18”
Galvanized Metal
Manual Butterfly Valve Size:13 Inch Diameter Includes side vent panels orA circular disk mounted on an internal shaft pivots to control airflow from fully open ( 100% flow), to fully closed (shutting off all air), to anything in between. Once the butterfly valve is set, a locking quadrant holds it in place. Known as Butterfly Damper, Butterfly Valve, or Volume Damper Diameters are + 1 8 inch. *The actual product may differ from the product image.
