Maximum Dynamic Closure Velocity (fpm)
Maximum UL555S Rated Pressure (in.wg.)
Maximum Vertical Size (in.)
MANUFACTURER
MODEL
Fire Dampers
128 × 96 or 144 × 48
POTTORFF
FD-150/350
4,000/2,000*
6/4**
GREENHECK
DFDAF-310
4,000/2,000
8/4
128 × 100
RUSKIN
DFD60
4,000/3,000/2,000
8/6/4
128 × 48 or 64× 96
POTTORFF
FD-125R
2,000
4
24 Ø
GREENHECK
DFDR-510
2,000
4
24 Ø
RUSKIN
FDR25
2,000
4
24 Ø
POTTORFF
FD-150-OP
4,000/2,000*
6/4**
36 × 36
GREENHECK
−
−
−
−
RUSKIN
DFD60GA
2,000
6/4
32 × 36
*2,000 fpm Multiple Sections **Below 8" in Height, above 64" x 48" or above 32" x 96"
Life-Safety Damper Model Number Format F = Fire / S = Smoke / FS = Fire/Smoke
FSD-51-xx
D = Damper
Blade Type - 4 = Triple-V 5 = Airfoil
Leakage Class - 1 = Class 1 2 = Class 2
Type (when applicable) - OP = Out of Partition SP = Side Pocket
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