Industrial Round Backdraft Damper
Round
The BD-85R industrial backdraft damper features a durable round frame and a single round blade, designed to allow forward airflow in the intended direction and prevent back-flow. It features a field adjustable counterbalance assembly and is ideal for high pressure and velocity applications.
Frame: Steel round, see table for details
Blade Material: Steel, see table for details
Blade Stop: Full open and closed position pin stop
Blade Style: Single round steel blade; reinforced where required
Axles: Plated steel, see table for details
Bearings: Stainless Steel Bushing
Control Shaft: 6" (152) long round drive axle, see table for details
Finish: Hi-Pro poly powder coat, gray, *MCOT of 250°F (121°C)
High-temp powder coat, gray, *MCOT of 400°F (204°C)
Minimum Size: 6" Ø (102 Ø)
Maximum Size: 44" Ø (1118 Ø)
Lifting Lugs: Four 1" (25) lifting lugs provided on
dampers > 16" Ø (406 Ø)
Velocity:
Up to 6,500 fpm (33.02 m/s)
Temperature:
–40°F to 400°F (–40°C to 204°C)
Pressure:
Up to 18.0 in.wg. (4.48 kPa)
© Copyright 2026 Pottorff