![Performance Data](/images/new-backgrounds/67549/675493x1.webp)
Performance Data
Performance data results from testing a 36 in. x 36 in.
(914mm x 914mm) damper in accordance with AMCA Standard
(1.201 kg/m3).
| Operational Data | ÆP in. wg | Velocity | ||
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| Without Weight | Blades Start to Open | 0.03 (7.5) | 10 (.05) | |
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Figure 5.3 | Blades Fully Open | 0.25 (62) | 2500 (12.7) | ||
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With Weights | Blades Start to Open | 0.01 (2.5) | 10 (.05) | ||
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| Blades Fully Open | 0.055 (13.7) | 1200 (6.1) | ||
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| Without Weights | Blades Start to Open | 0.025 (6.2) | 10 (.05) | |
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Figure 5.5 | Blades Fully Open | 0.32 (8) | 1200 (6.1) | ||
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With Weights | Blades Start to Open | 0.012 (3) | 10 (.05) | ||
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| Blades Fully Open | 0.08 (20) | 700 (3.6) | ||
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Leakage testing was conducted in accordance with AMCA Standard 500D and is expressed as CFM per sq. ft. of damper face area. All data has been corrected to represent standard air at 0.075 lb/ft3 (1.201 kg/m3).
Leakage
36 in. x 36 in. Damper
8.5
8
7
6
5
4
3
Difference | 2 |
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Pressure |
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1.0 | Wit |
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Static | .7 |
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.6 |
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12 3 4 5 6 7 8 920 30 40 50 60 70 80 90100 150
EM-30
Pressure Drop
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| 4 | * With Counterbalance |
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| 2 |
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| 1.0 |
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| .6 |
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wg) | .5 |
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.4 |
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(In. | .3 |
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Loss | .2 |
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Pressure |
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.10 |
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.09 |
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.08 |
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.07 |
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| .05 |
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| 5* |
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| .04 |
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| .03 |
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| 1 | 2 | 3 | 4 | 5 | 6 | 7 8 9 10 | 2 | 3 | 4 | 5 | 6 7 8 9 10 | 2 | 3 | 4 | 5 | 6 7 8 9 10 | |
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| x 10 |
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| x 100 |
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| x 1000 |
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Velocity (fpm)
Pressure Limitations
| 10 | 10.0 in. w.g. |
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| 8 |
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w.g.) | 6 |
| 6.0 in. w.g. |
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(in. |
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Pressure | 4 |
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| 4.0 in. w.g. |
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| 2 |
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| 0 0 | 12 | 24 | 36 | 48 | |
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| Damper Width (in.) |
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Velocity Limitations
10
Specifications
Air Leakage in CFM/Sq. Ft.
74 |
2500 fpm |
60 |
Backdraft dampers meeting the following specifications shall be furnished and installed where shown on plans and/or as described in schedules. Dampers shall consist of: heavy gauge 6063T5 extruded aluminum channel frame (0.125 in. [3.2mm] thick) with
31Ú8 in. (79mm) depth; blades from 0.070 in. (1.8mm) 6063T5 extruded aluminum; 3/4 in. (19mm) dia. metallic axles turning in acetal bearings; damper shall be equipped with extruded vinyl blade seals; and internal 1/8 in. (3mm) plated steel
Height (in.) |
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| 3000 fpm |
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Damper | 36 |
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| 3500 fpm |
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| 0 0 | 12 |
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| 36 | 48 | |
| 24 | ||||||
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| Damper Width (in.) |
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Copyright © 2008 Greenheck Fan Corporation