Specification Sheet
AIRFLOW & ZONE CONTROLS
Backdraft Dampers
Spring-Loaded Backdraft Dampers
PRODUCT
SPECIFICATIONS
& TECHNICAL
DATA
American ALDES Ventilation Corporation • 4521 19th Street Court East, Suite 104 • Bradenton, FL 34203 – USA
941.351.3441 • 800.255.7749 • 941.351.3442 (fax) • info@americanaldes.com • www.aldes.us
© 2013 American ALDES Ventilation Corporation. Reproduction or distribution, in whole or in part, of this document, in any form or by any means, without the express written consent of
American ALDES Ventilation Corporation, is strictly prohibited. The information contained within this document is subject to change without prior written notice.
BDD_spec_1013
DESCRIPTION
• 20-gauge galvanized steel housing.
• Aluminum spring-loaded buttery
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.
• Requires airows of 0.04 to 0.08 in. w.g. to
begin to open.
• May be installed in any position. The 14"
and 16" models require adjusting spring
tension if used in vertical position, with
airow down.
• The entire assembly inserts into duct for
simple installation.
• Exterior foam gaskets provide a tight seal
against interior surface of duct.
NOTE: Not recommended for use with clothes dryer, unless proper
provisions are made for regular cleaning. For this application, request
P/N 99 504, 4" diameter cape backdraft damper.
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
C
(Center Post)
NOMINAL A B C
4" 1-3/4" 2" 3-3/4"
5" 2" 2-1/2" 4-3/4"
6" 2-1/2" 3" 5-3/4"
7" 2-1/2" 3-1/4" 6-3/4"
8" 2-3/4" 3-3/4" 7-9/16"
NOMINAL A B C
10" 4-3/4" 5-3/4" 9-3/4"
12" 6-1/4" 6-3/4" 11-3/4"
14" 6-1/4" 7-3/4" 13-3/4"
16" 6-1/4" 10-3/4" 15-3/4"
PART NUMBER DIAMETER (NOMINAL)
99 023 4" (100 mm)
99 024 5" (125 mm)
99 025 6" (150 mm)
99 035 7" (175 mm)
99 026 8" (200 mm)
99 027 10" (250 mm)
99 028 12" (315 mm)
99 036 14" (355 mm)
99 037 16" (400 mm)
Airow Performance