Fire Dampers
1 ½ AND 3HR RATED FIRE DAMPERS
Fire dampers are fire protection products used in heating, ventilation, and air conditioning ducts to prevent the spread of fire inside the ductwork through fire-resistance rated walls and floors. Fire dampers are UL555 tested and designed to close upon the detection of elevated heat.
¢ 1½ and 3 Hour UL 555 Rating ¢ System pressures up to 6 in.wg. ¢ Meets NFPA Standards ¢ Stainless Steel Construction Available ¢ CSFM Listing
ECONOMICAL ROLL-FORMED TRIPLE-V GROOVED BLADES
LOW PROFILE AIRFOIL BLADES FOR HIGH PERFORMANCE
FD-140
TRUE ROUND
Our round fire dampers are designed for use in fire rated walls and floors and are the perfect, economical, choice for round ducted systems. They are UL555 tested and designed to close upon the detection of elevated heat.
¢ 1½ and 3 Hour Rating ¢ Meets NFPA Standards ¢ Stainless Steel Construction Available ¢ CSFM Listing
VFD-15R
FD-125R
MAXIMUM DYNAMIC CLOSURE RATING
DAMPER MAXIMUM SIZE (in)
UL555 FIRE RESISTANCE (hr)
MIN SIZE (in)
MODEL
BLADE TYPE
PRESSURE (in.wg.)
VELOCITY (fpm)
WALL
FLOOR
STANDARD
72×48 36×96 128×96 120×96 72×48 36×96
72×48
4000*
6
FD-140
1½
3V
6×6
●
–
120×96
4000*
6***
FD-150
1½
AIRFOIL
8×6
–
4000*
6
FD-340
3
3V
6×6
●
–
64×96
4000*
6**
FD-350
3
AIRFOIL
8×6
OUT-OF-PARTITION FD-140-OP FD-150-OP
– –
6×6 8×6
36×48 36×36
36×48 36×36
4000 4000
6** 6
1½ 1½
3V AIRFOIL
TRUE ROUND FD-125R VFD-15R VFD-35R
8 Ø 6 Ø 6 Ø
24 Ø 20 Ø 20 Ø
24 Ø 20 Ø –
2000 – –
4 – –
1½ 1½ 3
ROUND ROUND BUTTERFLY ROUND BUTTERFLY
● – –
*2000 FPM on multi-sections | **4 in.wg. below 8" in height | ***4 in.wg. below 8" in height when sizes exceed 64"×48" or 32"×96"
See catalog online for stainless steel max sizes
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