Backdraft Damper
The BD-31 backdraft damper employs gravity operated fabric style blades to restrict airflow and to permit the forward flow of air in the intended direction. The BD-130 damper may be mounted vertically or horizontally (airflow up) in either exhaust or intake installations for low to medium velocity and pressure applications.
Frame: 2" x 1/2" X 0.06" (51 x 13 x 1.5) extruded aluminum channel.
Blades: Double-coated neoprene Ventglas woven fiberglass-fabric.
Backing: 1/2" x 19 ga. (13 x 2) wire mesh.
Minimum Size: 6" x 6" (152 x 152)
Maximum Size: Single Section: 36" x 24" (914 x 610)
Multiple Section: Unlimited
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