Model FRP-BD-94

Fiberglass Industrial Backdraft Damper
Airfoil Blade

The FRP-BD-94 fiberglass damper is used in applications where corrosive air exists for exhaust, supply or pressure relief. Backdraft dampers employ counter-balanced gravity operated airfoil blades and a rugged channel frame to restrict reverse airflow and to permit the forward flow of air in the intended direction. Adjustable counterbalances attached to the blade axles permit field adjustment to regulate start-to-open blade operation.

Standard Construction

Frame: 8" x 2-3/16" x 1/4" (203 x 56 x 6) vinyl ester resin.

Blades: Vinyl ester resin, Airfoil 7-1/2" (191) wide.

Axles: 3/4" (19) diameter pultruded fiberglass axles. 316SS axles on blades with counter weights.

Linkage: 316SS out of airstream.

Counterbalance Assembly: 316SS out of airstream.

Bearings: Molded PTFE.

Minimum Size: 6" x 8" (152 x 203)
Maximum Size: 48" x 72" (1219 x 1829)

Ratings

Leakage with Low Leakage Seals:

12.0 cfm/ft² @ 1 in. wg. (0.61 m³/s/m² @ 0.25 kPa) for 12" (305) damper width
10.0 cfm/ft² @ 1 in. wg. (0.51 m³/s/m² @ 0.25 kPa) for 24" (610) damper width
7.0 cfm/ft² @ 1 in. wg. (0.35 m³/s/m² @ 0.25 kPa) for 36" (914) damper width
7.0 cfm/ft² @ 1 in. wg. (0.35 m³/s/m² @ 0.25 kPa) for 48" (1219) damper width

Maximum Temperature: -20^oF to 200^oF (-28^oC to 94^oC)