Model FRP-BDR

Fiberglass Industrial Backdraft Damper
Single Blade - Round

FRP-BDR backdraft dampers are used in applications where corrosive air exists for exhaust, air supply or pressure relief. They employ a rugged round fiberglass channel frame and a single round counterbalanced fiberglass blade to restrict reverse airflow and to permit the forward flow of air in the intended direction. Adjustable counterbalance attached to the quadrant permits field adjustment to regulate start-to-open and full open blade operation. The FRP-BDR damper may be mounted vertically or horizontally in either exhaust or intake installations for medium to high velocity and pressure applications.

Standard Construction

Frame: Molded fiberglass channel with FRP blade stop.

Blades: Fiberglass.

Axles: Full length 316 SST.

Bearings: Molded, graphite filled PTFE sleeve bearings.

Counterweight assembly: 316 SST arm with 316 SST weights to be positioned and secured in field for sizes greater than 12" (305).

Sizes (diameters): 6" (152), 7" (178), 8" (203), 9" (229), 10" (254), 12" (305), 14" (356), 16" (406), 18" (457), 20" (508), 22" (559), 24" (610), 26" (660), 28" (711), 30" (762), 32" (813), 36" (914), 42" (1067), 48" (1219)

Ratings

Leakage Performance with Blade Seals Preventing Backflow:
12" Ø (305): 28 cfm @ 1" wg
24" Ø (610): 46 cfm @ 1" wg
36" Ø (914): 52 cfm @ 1" wg
48" Ø (1219): 65 cfm @ 1" wg

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