Continental AXC Fan Brochure

DAMPERS
BDD BACKDRAFT DAMPERS
BDD Backdraft Dampers provide an economical solution to troublesome backdrafts. These premium quality backdraft dampers
feature aluminum butterfly damper blades and are available in either spring loaded or gravity style designs.
SPRING LOADED DAMPERS
• Neoprene damper seal to minimize air leakage
• Steel housing, aluminum 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 / post designs
• 10” & 12” sizes include rolled metal sleeve with center post design
GRAVITY OPERATED 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 7”, 14” & 16” sizes
MODEL A B
C
(Nominal)
Gauge
SPRING LOADED DAMPERS
BDD100 1.8 2.0 4 20
BDD125 2.0 2.5 5 20
BDD150 2.5 3.0 6 20
BDD200 2.8 3.8 8 20
BDD250 4.8 6.0 10 20
BDD300 6.3 6.8 12 20
GRAVITY OPERATED DAMPERS
BDD175 7.0 - 7 28
BDD355 12.0 - 14 24
BDD400 14.0 - 16 22
DIMENSIONS IN INCHES*
*DO NOT USE FOR CONSTRUCTION
CONSULT FACTORY FOR CERTIFIED PRINTS
C
A
B
SPRING LOADED DAMPERS
4”, 5“, 6” & 8”
A
B
C
SPRING LOADED DAMPERS
10” & 12”
C
A
GRAVITY OPERATED DAMPERS
7”, 14“ & 16”
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
00.050.100.150.200.250.30
AIRFLOW PERFORMANCE (CFM)
AIRFLOW (CFM)
PRESSURE (IN. WG)
BDD400
BDD355
BDD175
BDD250
BDD200
BDD100
BDD150
BDD125
BDD300