Duct to Sleeve Connection
Sleeve Gauge and Connection Type Requirements
Dampers are supplied with sleeves and actuators from the factory and can be installed without the need for
additional field installed sleeves. Damper sleeves should be a minimum of 24 ga. (0.6 mm). The sleeve thickness
must also not be less than the gauge of the connecting duct. If duct gauge is 16 ga. (1.5 mm) or greater, the
breakaway connection is rigid.
Approved Breakaway Connections
All breakaway connections described below may utilize the following duct sealants: PA2084T duct sealant adhesive
manufactured by Precision, DP1010 water base duct sealant manufactured by Design Polymerics, Grey Pookie,
Ductmate PROseal®, or CL Ward S Seal in accordance with SMACNA recommendations.
Transverse Joints
The transverse joints shown below are approved as breakaway connections.
• A maximum of two #10 (19 mm) sheet metal screws on each side and on the bottom may be used. The screws
should be located in the center of the slip pocket and penetrating both sides of the slip pocket.
• Dampers up to 20 inches (508 mm) high may use transverse joints on the top and bottom and Drive Slip joints
(
see Figure 6
) on the sides.
Plain “S” Slip Hemmed “S” Slip Double “S” Slip
Inside Slip Joint Standing “S” Standing “S” (Alt.)
Standing “S” (Alt.) Standing “S” Standing “S”
(Bar Reinforced) (Angle Reinforced)
Figure 6
Drive Slip Joint
Figure 7
Round and Oval Duct Breakaway Connections
Round or flat oval ducts connected to Type R or O damper collars shall be attached with #10 (19 mm) sheet metal
screws as follows:
• Ducts to 22 in. (558 mm) wide (or dia.) and smaller shall have three screws.
• Ducts larger than 22 in. (558 mm) wide (or dia.) up to and including 36 in. (914 mm) wide (or dia.) shall have five
screws.
Wall or Floo
r
Sleeve
Duct
Damper
Type B
Wall or Floo
r
Sleeve
Duct
Damper
Type R, O
Type R and O
factory furnished
duct collars qualify
as breakaway
connections.
Figure 8: Type R and O Transition
CFSD Series
5
®
