Application Guide

Spring Loaded
Backdraft Dampers
• 20 gauge galvanized steel
housing
• Aluminumspringloadedbuttery
damper blades
• Damper seals against EDPM
rubber gasket in closed
position for minimal leakage
• Gasket designed for use in
temperatures from - 22°F to180°F
• Require from 0.04 to 0.08 inches
W.G. to begin to open
• Maybeinstalledinanyposition.
(14" and 16" models require
adjusting spring tension if used
inverticalposition,withairow
down)
• Simple installation - entire
assemblyinsertsintoduct
• Exterior foam gaskets assure a
tight seal against interior surface
of duct
4" 100 # 99 023
5" 125 # 99 024
6" 150 # 99 025
7" 175 # 99 035
8" 200 # 99 026
10" 250 # 99 027
12" 315 # 99 028
14" 355 # 99 036
16" 400 # 99 037
DIAM IN.
(Nominal)
PN:
DIAM MM.
(Nominal)
American ALDES reserves the right to change
productspecicationswithoutnotice.
NOTE: Not recommended for use with clothes
dryer,unlessproperprovisionsaremadefor
regular cleaning. For this application, requrest
P/N 99504, 4" dia. cape damper.
bdd_brochure_0810
4521 19th Street Court E., Suite 104, Bradenton, FL 34203 USA
Phone: [phone] | Fax: [phone]
www.americanaldes.com | Email: [e-mail]
Note: Position of post in sleeve and number of springs varies
according to model.
4"- 8" MODELS
STAMPED METAL SLEEVE / CENTER PIN DESIGN
10"- 16" MODELS
ROLLED METAL SLEEVE / CENTER POST DESIGN
Center
(8” with Center Post)
NO-
MINAL
A" B" C"
4" 1¾ 2 3¾
5" 2 2½ 4¾
6" 2½ 3 5¾
7" 2½ 3¼ 6¾
8" 2¾ 3¾ 7
9/16
NO-
MINAL
A" B" C"
10" 4¾ 5¾ 9¾
12" 6¼ 6¾ 11¾
14" 6¼ 7¾ 13¾
16" 6¼ 10¾ 15¾