BD-33 1-⅞” Commercial Rectangular Backdraft Damper

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Damper Depth1-7/8"
DescriptionGravity Operated Backdraft, Single Thickness (Horizontal Mount, Upflow)
Max Face Velocity2500 FPM
Max Pressure1 in. wg
Max Temperature200 F
Min Size6" x 6"
Max Size30" x 96"
Frame Material.063 6063-T5 Extruded Aluminum (Flanged or Drop-In)
Blade Material24 Ga. Aluminum thru 22 Ga. Aluminum
Axles3/16" Dia. Plated Steel, Full Length
BearingsHeavy Duty Molded Nylon
LinkagePlated Steel Brackets, Stainless Steel Shoulder Rivets and Aluminum Linkage Bars
StopsAluminum Angle
ActuatorGravity Operated Is Standard (Optional Manual or Electric)
SealsPolyurethane Sponge On The Sill and Felt Between Adjacent Blades


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