Model DFD-M150
Dynamic Rated Fire Dampers
11/2Hour Fire Resistance Rating (UL555)
4 Hour Fire Resistance Rating (BS476)
APPLICATION
Model DFD-M150 is approved for use in walls, floors and
partitions with fire resistance ratings less than 3 hours.
This model carries a 11/2hour UL fire damper label. UL
555 classifies dynamic rated fire dampers for use in HVAC
systems that are operational in the event of fire.
Model DFD-M150 has also been tested in accordance with
BS476 to 4 hours at Warrington Fire, UK, and is approved
for fire partitions of 4 hours or less where British Standards
are required.
CONSTRUCTION
Galvanized steel (in gauges required by UL listing R-13317)
INSTALLATION
All fire damper installations require the use of sleeves,
angles and methods described in Greenheck Fire Damper
Installation Instructions #452763, included with every
damper shipment. Sleeves can be field fabricated or factory
furnished as a complete damper/sleeve assembly. See
Factory Sleeve Option below for details.
94mm
W*
H*
94mm
H*
*O
W*
TYPE A TYPE B
* These dimensions are furnished approximately 6mm undersize.
Features:
• Stainless steel closure springs
• Fusible links (69° C for BS476, 74°C standard
for UL, 100°C available)
• Can be mounted horizontally or vertically.
FACTORY SLEEVE OPTION
DFD-350 Fire Dampers are available in factory furnished sleeves. Sleeves are
galvanized steel and are available in 1.0mm - 1.5mm thicknesses and lengths up to
914mm.
“K” dimension specifies location of damper within the sleeve. Minimum is 102mm,
maximum is “L” less 102mm, which allows for mounting angle installation and
duct connection at each end of sleeve. If “K” dimension is not specified, it will be
provided as one half of “L” dimension (damper centered in sleeve).
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When sealed option is selected, B transitions
will need to be field sealed in the area where
duct to sleeve connection is made.
Type B corner profile
Type B with sleeve
Model DFD-M150 meets the requirements for fire dampers
established by:
National Fire Protection Association
(NFPA Standards 80, 90A & 101)
Underwriters Laboratories Standard 555 (Listing #R-13317)
BOCA National Building Codes
ICBO Uniform Building Codes ( UBC Standard 43-7)
SBCCI Standard Building Codes
New York City ( MEA listing #260-91-M)
California State Fire Marshall
(Listing #3225-981:102 for use in walls)
British Standard BS476
Tested to 4 hours at Warrington Fire, UK
“UL CLASSIFIED (see complete marking on product)”
“UL CLASSIFIED to Canadian safety standards (see
complete marking on product)”
Standard 555 (Listing #R13317)
