| VD-1250 Series Aluminum Control Dampers | ||||||
|---|---|---|---|---|---|---|
| Leakage resistance | VD-1250 | 3 cfm/sq. ft maximum at 1 in. static
pressure 8 cfm/sq. ft maximum at 4 in. static pressure 11 cfm/sq. ft maximum at 8 in. static pressure up to 48 in. wide |
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| Operating torque | VD-1250 | 0.5 in. static pressure, 100 fpm fully
open approach velocity 1 in. static pressure, 1,000 fpm fully open approach velocity 10 in. static pressure, 2,500 fpm fully open approach velocity |
7 lb·in/sq. ft 7 lb·in/sq. ft 9 lb·in/sq. ft |
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| Pressure drop (inches WG) - Fully open | Size (in.) | Approach velocity (fpm) | ||||
| 1,000 | 2,000 | 3,000 | 4,000 | |||
| VD-1250 | 24 x 24 | 0.02 | 0.08 | 0.17 | 0.3 | |
| 36 x 36 | 0.02 | 0.04 | 0.10 | 0.2 | ||
| Velocity requirements | Width (in.) | |||||
| 12 | 24 | 36 | 48 | |||
| VD-1250 | 6,000 fpmat 13 in. static | 5,000 fpmat 10.8 in. static | 4,000 fpmat 8.5 in. static | 4,000 fpmat 6.0 in. static | ||
| Temperature rating | Standard and extended operating conditions | VD-1250 | -72°F to 275°F (-58°C to 135°C) | |||
| Actuator | -4°F to 122°F (-20°C to 50°C) | |||||
| Approximate weight | VD-1250 | 7 lb/sq. ft (3.2 kg/sq. ft) | ||||
| Actuator | 2.9 lb (1.6 kg) per actuator | |||||
Note: All performance data is determined using instrumentation and procedures at an AMCA
Certified Laboratory in accordance with AMCA Standard No. 500, Test Methods for
Louvers, Dampers, and Shutters.