BDD 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.

Features & Benefits of BDD Backdraft Dampers

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 in. 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″ sizes include stamped metal sleeve with center pin design
• 10″ & 12″ sizes 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
• Suitable for supply or exhaust applications
• Available in three sizes: 7″, 14″ & 16″ sizes

Select the Charts / Diagrams tab below for performance and dimension details on the following BDD models:

Spring Loaded Backdraft Damper Models:

• BDD100
• BDD125
• BDD150
• BDD200
• BDD250
• BDD300

Gravity Operated Backdraft Damper Models:

• BDD175
• BDD355
• BDD400

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