2550 Series- Round Thin-Line Out-of-Airstream 1-1/2 Hour Rated Fire Damper

Standard Features
Spring actuated curtain-type fire damper with 2 1/4" round connection for horizontal or vertical mount
2" thin-line roll formed out-of-airstream frame
Designed for use in walls, floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application, see 2700 series)
UL listed and tested in accordance with UL Standard 555
1 1/2 hour fire resistance rating
Building materials rated 2 hours or less
CSFM California State Fire Marshal listed
Interlocking steel roll-formed blades
Blade lock to secure blades once the product is activated
Damper manufactured from corrosion tested galvanized mild steel (G-90)
165° replaceable fusible link (#50)
Available in 4" through 29" round

Vertical mount only, available 4" through 40" round (2549)
Stainless steel

2550 Series Submittal
Sleeve Submittal

2550 Series Engineering/Performance Data

2500/2600 Installation Instructions
Recommended Minimum Sleeve Thickness for Fire Dampers