Backdraft Dampers

Description

BDD backdraft dampers are available in the spring-loaded and gravity style backdraft dampers. The spring loaded dampers are available in 4″, 5″, 6″ & 8″ models with a center pin design and a 10″ & 12″ center post design. The gravity damper is available in 7″,14″ & 16″ and offers a galvanized steel housing and aluminum butterfly damper blades. Available backdraft damper models:

Spring Loaded Dampers

BDD100 Backdraft damper 4″
BDD125 Backdraft damper 5″
BDD150 Backdraft damper 6″
BDD200 Backdraft damper 8″
BDD250 Backdraft damper 10″
BDD300 Backdraft damper 12″

Gravity Operated Dampers

BDD175 Backdraft damper 7″
BDD355 Backdraft damper 14″
BDD400 Backdraft damper 16″

PDF DIMENSIONAL DRAWING

Categories: Fan Accessories, Fan Accessories, Residential.

Features
Spring Loaded Backdraft Dampers
- Neoprene damper seal minimizes leakage
- 20 gauge steel housing, aluminum spring loaded butterfly damper blades
- Gasket designed to withstand temperatures from -22 F to 180 F
- Requires from 0.04 to 0.08 inches wg pressure to open
- Simple installation in any position – entire assembly inserts into duct
- Exterior foam gasket assures a tight seal against duct
- 4″, 5″, 6″ & 8″ models include stamped metal sleeve with center pin design
- 10″ & 12″ models include rolled metal sleeve with center post design
Gravity Operated Backdraft Dampers
- Low air leakage design
- Galvanized steel housing, aluminum butterfly damper blades
- Gravity operated closure
- Install in horizontal or vertical (upblast only) position
- Ideal for supply or exhaust applications
- Available in three sizes: 7″, 14″ & 16″
Charts / Diagrams