Model BD-30-SS

Backdraft Damper
Formed Style Blade

BD-30-SS backdraft dampers employ gravity operated formed style blades to restrict reverse airflow and to permit the forward flow of air on the intended direction. The BD-30-SS damper may be mouted vertically or horizontally in either exhaust or intake installations for low velocity and pressure applications.

Standard Construction

Frame: 2" x 1/2" x 20 ga. (51 x 13 x 0.95) stainless steel channel.
Blades: 22 ga. (0.80) 304 stainless steel formed.
Axles: 3/16" (4.8) diameter sythetic.
Linkage: 22 ga. (0.80) 304 stainless steel.
Seals: Neoprene blade edge seals.
Minimum Size: 6" x 6" (152 x 152)
Maximum Size: 
Single Section: 36" x 24" (914 x 610)
Multiple Sections: Unlimited

Ratings

Leakage:
9.5 cfm/ft² @ 3.5 in. wg. (0.05 m³/s/m² @ 0.9 kPa)
8.5 cfm/ft² @ 3.0 in. wg. (0.04 m³/s/m² @ 0.8 kPa)
7.0 cfm/ft² @ 2.0 in. wg. (0.03 m³/s/m² @ 0.5 kPa)

Temperature: -25^oF to 150^oF (-32^oC to 66^oC)