E9
MULTI-BLADE FIRE DAMPERS
• "OUT OF WALL"
MOUNTING
• AIRFOIL BLADE
• UL 555 CLASSIFIED
DYNAMIC FIRE DAMPER
The Model D1201-OW is an "out of wall" high performance fire damper. It is specifically designed for supply or return ducts that terminate
at a grille and provides through the grille access to the damper. Standard sleeve length accommodates most commercial supply and
return grilles/registers.
The D1201-OW is ideal for applications where building codes require a fire damper for the protection of ductwork penetrations in walls or
floors that have a fire resistance rating of up to 2 hours.
The D1201-OW offers premium performance and a low pressure drop well suited to the majority of commercial applications. Unique,
inter-locking double skin blade design eliminates combustible seals and provides flame protection under fire conditions at temperatures
up to 2000°F.
The D1201-OW is supplied as standard with an internal locking quadrant which holds the damper in the fully open position, but may also
be used for system balancing if required.
Model D1201-OW
OUT OF WALL MULTI-BLADE FIRE DAMPERS
E9
E
MUL
TI-BLADE
FIRE
DAMPERS
MODEL: D1201-OW
AIRFOIL
CONSTRUCTION DETAILS:
Frame:
5" x 7/8" x 16 ga. (127 x 22 x 1.6) galvanized steel hat channel.
Blades:
14 ga. (2.0) equivalent galvanized steel formed airfoil on 5 1/2"
(140) centers. Opposed action.
Sleeve:
16" x 20 ga. (406 x 1.0) galvanized steel with 3/4" (19) flange on
one end standard.
Insulation:
Intumescent thermal insulation on four sides.
Linkage:
Concealed in frame. 12 ga. (2.7) plated steel.
Bearings:
1/ 2" (13) dia. self-lubricating oilite bronze.
Axles:
1/ 2" (13) dia. plated steel double bolted to blades.
Jackshaft:
1/2" (13) dia. cadmium plated steel.
Internal locking quadrant is factory installed.
Fusible Link:
165°F (74°C) standard.
212°F (100°C) available.
Minimum Size:
Vertical or Horizontal mount: 8" W x 8" H (203 x 203).
Maximum Size:
Single Section
Vertical mount:
36" W x 48" H (914 x 1219).
Horizontal mount:
32" W x 48" H (813 x 1219).
Multiple Section Assemblies are not permitted.
5"
(127)
W = NO
MINAL
DUCT
SIZE -
1/4" (6)
H = NOMINAL
DUCT
SIZE - 1/4" (6)
MODEL D1201-OW
(DAMPER ONLY SHOWN)
QUALIFICATIONS:
• UL 555 CLASSIFIED DYNAMIC FIRE DAMPER • 1 1/2 hr. Label
(File # R9492).
• CAN/ULC-S112 CLASSIFIED FIRE DAMPER (File # R19569).
• Meets NFPA 80, 90A and 101 as well as IBC and NBC (Canada) and
associated local building code requirements.
• Maximum velocity 2000 fpm @ 4" w.g. (10 m/s @ 1 kPa) (up to 3000 fpm
with size limitations).
• For use in vertical or horizontal concrete partitions and vertical steel stud
partitions only.
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