Fire Damper Properties
Blade Style
Fire Resistance Ratings
Air Performance Stats
Static Pressure
Air Velocity
Damper Sizing
Max Single Panel Size
Mount Orientation
Frame Type
Frame Shape
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\01 [17D]\thumb_LD - 17D.png)
Model: 17D
Frame Type: 4-7/8" x 22ga w/ Curtain Blade
Material: Galvanized Steel
Fire Resistance: 1.5 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 24" x 24"
Max Vertical Panel Size: 36" x 36"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\02 [17DF]\thumb_LD - 17DF.png)
Model: 17DF
Frame Type: 4-7/8" x 22ga w/ Thinline Curtain Blade
Material: Galvanized Steel
Fire Resistance: 1.5 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: N/A
Max Vertical Panel Size: 24" x 24"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\03 [17DX]\thumb_LD - 17DX.png)
Model: 17DX
Frame Type: Integral 12" x 22ga w/ Curtain Blade
Material: Galvanized Steel
Fire Resistance: 1.5 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 24" x 24"
Max Vertical Panel Size: 36" x 36"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\04 [17MA]\thumb_LD - 17MA.png)
Model: 17MA
Frame Type: 5-1/2" x 16ga w/ Airfoil Blade
Material: Galvanized Steel
Fire Resistance: 1.5 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 32" x 48"
Max Vertical Panel Size: 32" x 48"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\05 [17MD]\thumb_LD - 17MD.png)
Model: 17MD
Frame Type: 5-1/2" x 16ga w/ Single Thickness (UVU) Blade
Material: Galvanized Steel
Fire Resistance: 1.5 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 36" x 48"
Max Vertical Panel Size: 36" x 48"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\06 [17MDSS]\thumb_LD - 17MDSS.png)
Model: 17MD(SS)
Frame Type: 5-1/2" x 16ga w/ Single Thickness (UVU) Blade
Material: Stainless Steel
Fire Resistance: 1.5 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 24" x 24"
Max Vertical Panel Size: 36" x 32"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\02 [3 Hour Rated]\01 [38D]\thumb_LD - 38D.png)
Model: 38D
Frame Type: 4-7/8" x 22ga w/ Curtain Blade
Material: Galvanized Steel
Fire Resistance: 3.0 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 24" x 24"
Max Vertical Panel Size: 36" x 36"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\02 [3 Hour Rated]\02 [38DX]\thumb_LD - 38DX.png)
Model: 38DX
Frame Type: Integral 12" x 22ga w/ Curtain Blade
Material: Galvanized Steel
Fire Resistance: 3.0 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 24" x 24"
Max Vertical Panel Size: 36" x 36"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\02 [3 Hour Rated]\03 [38MA]\thumb_LD - 38MA.png)
Model: 38MA
Frame Type: 5-1/2" x 16ga w/ Airfoil Blade
Material: Galvanized Steel
Fire Resistance: 3.0 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 30" x 48"
Max Vertical Panel Size: 60" x 36"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\02 [3 Hour Rated]\04 [38MD]\thumb_LD - 38MD.png)
Model: 38MD
Frame Type: 5-1/2" x 16ga w/ Single Thickness (UVU) Blade
Material: Galvanized Steel
Fire Resistance: 3.0 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 30" x 48"
Max Vertical Panel Size: 36" x 48"
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\08 [R7]\thumb_LD - R7.png)
Model: R7
Frame Type: 16" x 20ga w/ True Round Single Thickness (UVU) Blade
Material: Galvanized Steel
Fire Resistance: 1.5 hrs
Max Velocity: 2000 fpm
4 in wg
Max Horizontal Panel Size: 24" dia.
Max Vertical Panel Size: 24" dia.
![](/tools\uss\Louvers & Dampers\19 [Dynamic Fire Dampers]\01 [1.5 Hour Rated]\07 [S3]\thumb_LD - S3.png)
Model: S3
Frame Type: 4-1/2" x 20ga w/ True Round Curtain Blade
Material: Galvanized Steel
Fire Resistance: 1.5 hrs
Max Velocity: 3000 fpm
4 in wg
Max Horizontal Panel Size: 24" dia.
Max Vertical Panel Size: 24" dia.