| Specification | Description |
|---|---|
|
Leakage Resistance - Fully Closed |
6 cfm/sq. ft maximum at 4 in. static pressure |
|
Pressure Drop (inches WG) - Fully Open |
1 in. static pressure and 1,000 fpm fully open approach velocity |
|
Operating Torque |
VD-1240: 7 lb·in./sq. ft VD-1241: 14 lb·in/sq. ft based on 2.5 in. static pressure and 1,000 fpm fully open approach velocity |
|
Temperature Rating |
Standard Operating Conditions: -72 to +275 ° F (-58 to +135 ° C) Actuator: -4 to 122 ° F (-20 to 50 ° C) |
|
Approximate Weight |
VD-1240 Damper: 7 lb/sq. ft (3.2 kg/sq. m) VD-1241 Damper: 15 lb/sq. ft (6.8 kg/sq. m) Actuator: 2.9 lb (1.32 kg) Pneumatic D-306: 1.2 lb (0.54 kg) Pneumatic D-3153: 10.0 lb (4.5 kg) |
| Performance | Description | ||||
|---|---|---|---|---|---|
| Damper Width (in. [mm]) |
60 (1,524) |
48 (1,219) |
36 (914) |
24 (610) |
12 (305) |
| Maximum System Pressure (in. w.g.) |
3.0 |
6.0 |
8.5 |
10.8 |
13.0 |
| Maximum System Velocity (FPM) |
3,000 |
4,000 |
4,000 |
5,000 |
6,000 |
|
Leakage - % of Maximum Flow |
.08 |
.07 |
.08 |
.07 |
.08 |
|
Leakage - (CFM/sq. ft) |
2.5 |
2.7 |
3.5 |
3.5 |
5.0 |
| Performance | Description | ||||
|---|---|---|---|---|---|
| Damper Width (in. [mm]) |
60 (1,524) |
48 (1,219) |
36 (914) |
24 (610) |
12 (305) |
| Maximum System Pressure (in. w.g.) |
3.0 |
6.0 |
9.0 |
11.0 |
13.0 |
| Maximum System Velocity (FPM) |
3,000 |
4,000 |
4,000 |
5,000 |
6,000 |
|
Leakage - % of Maximum Flow |
.08 |
.07 |
.08 |
.07 |
.08 |
|
Leakage - (CFM/sq. ft) |
2.5 |
2.7 |
3.2 |
3.5 |
5.0 |