Greenheck Stainless Steel Round Backdraft Damper... User manual

SSWDR-53
Stainless Steel Round
Backdraft Damper
APPLICATION
Model SSWDR-53 is a round backdraft damper
which may be mounted horizontally for airflow up or
down, or mounted vertically for horizontal airflow.
RATINGS
Pressure: 3 in. wg (.7 kPa)
Velocity: 2000 fpm (10.2 m/s)
Temperature: 180°F (82°C)
STANDARD CONSTRUCTION
Frame: 20 ga. (1mm) 304 stainless steel
Blades: 24 ga. (.7mm) 304 stainless steel
Blade Seal: closed cell neoprene/EPDM/SBR
blend
SIZE LIMITATIONS (available in 1 in. [25mm]
increments)
Minimum Size: 4 in. (102mm)
Maximum Size: 24 in. (610mm)
OPTIONAL FEATURES
Extended Frame
3.25 in.
(83mm)
L
Frame
Extended Frame
Springs
Seal
Airflow
Copyright © 2008 Greenheck Fan Corporation
SSWDR-53 Rev. 2 October 2008
Diameter is approximately 1/8 in. (3mm) undersize.
Frame Dimensions
Damper Model Length
SSWDR-53 Standard Frame 3.25 in.
(83mm)
SSWDR-53 Extended Frame
Damper Diameter Length
“L”
5 in. - 10.999 in.
(127mm - 279mm)
7.25 in.
(184mm)
11 in. - 16.999 in.
(279mm - 432mm)
10.25 in.
(260mm)
17 in. - 24 in.
(432mm - 610mm)
13.25 in.
(336mm)