SDGE - Spiral Duct

Product Information

View Performance Data SDGE - Spiral Duct

Spiral Duct Register
Extruded Aluminum Construction SDGE
Price SDG Spiral Duct Grilles was designed to be mounted on a round or spiral duct without the use of transitions. It features extruded aluminum construction throughout and is available in single or double deflection configurations. The blades are individually adjustable, giving the customer virtually endless possibilities to direct supply air to meet space requirements. The face frame of the SDGE is curved to match the radius of the duct, allowing the grille to fit snugly around it.

The look of the grille can be further enhanced by selecting the clear anodized finish. The SDGE is also available in any Price standard paint finish, including custom matched colors. SDGE series grilles combine architectural appeal with excellent performance characteristics, making them a perfect choice for high profile applications.


  • Extruded Aluminum Construction.
  • End frames match duct curvature.
  • Double deflection core with individually adjustable airflow blades.
  • 3/4” blade spacing.
  • Clear anodized or paint finish.
  • Optional air scoop (AS) available.
  • Mounts directly to duct.
  • Closed cell foam gasket attached to the border provides a tight seal around opening in the duct.
  • Optional steel opposed blade damper (VCS3).


Recommended SDGE Size for Minimum Duct Diameter
Duct Dia. Nom. Width
  3 4 6 8 10 12
6 x x        
8 x x x      
10 x x x x    
12 x x x x x  
14 x x x x x x
16 x x x x x x
18 x x x x x x
20 x x x x x x
22 x x x x x x
24 x x x x x x
26 x x x x x x
28 x x x x x x
30 x x x x x x
32 x x x x x x
36 x x x x x x

    Product Selection Checklist

  1. Select Unit Size based on desired performance characteristics.
  2. Select Finish.
SDGE // I / 12 / 24 / 4 / DD / S // AS // A / B12

Application Recommendations: A Fastening

Mounting / Finish Options

Countersunk screwhole A
Clear Anodized CA
White Powder Coat B12
For optional and special finishes see color matrix.
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