Greenheck Steel Airfoil Blades FSD-311V Specification Sheet page 5
Combination fire smoke dampers steel airfoil blades ul 555s leakage class i ul555 1 1/2 hour fire resistance rating
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Also See for Steel Airfoil Blades FSD-311V:
- Installation, operation and maintenance instructions (8 pages) ,
- Manual (12 pages)
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AmCA 5.5 Pressure drop
* Sizes are in inches.
12 in. x 12 in. (305mm x 305mm)
Velocity
Pressure Drop
(fpm)
(in. wg)
500
0.04
1000
0.18
1500
0.42
2000
0.75
2500
1.17
3000
1.68
3500
2.29
4000
2.09
4 (W) (H)
D
3.14
24 in. x 24 in. (610mm x 610mm)
Velocity
Pressure Drop
(fpm)
(in. wg)
500
0.03
1000
0.13
1500
0.29
2000
0.52
2500
0.81
3000
1.17
3500
1.60
4000
2.14
Fsd-311V
36in. x 36 in. (914mm x 914mm)
Velocity
Pressure Drop
(fpm)
(in. wg)
500
0.03
1000
0.12
1500
0.27
2000
0.48
2500
0.75
3000
1.08
3500
1.48
4000
1.93
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