Siemens No. 3 Pneumatic Actuator
Pneumatic Actuator
No. 3
Designed with a 2-3/8-inch (60 mm) stroke, the No. 3 Pneumatic Actuator is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC dampers. The actuator is available in a variety of spring ranges for energy optimizing and sequencing with other devices.
• Ozone-resistant rolling rubber diaphragm
• Variety of installation options, including:
– Fixed bracket mounting
– Direct front mounting
– Pivot mounting for extended shaft
• Available with positioning relay
Select a link under the "item" tab below to order.
| Cat # | Mounting Style | Type | Descriptions |
| 331-4310 | Front | 3-7 psi (21-48 kPa) | Actuator |
| 331-4313 | Fixed | 3-7 psi (21-48 kPa) | Actuator, Bracket |
| 331-4312 | Pivot | 3-7 psi (21-48 kPa) | Actuator, Integral Pivot |
| 331-4311 | Extended Shaft | 3-7 psi (21-48 kPa) | Actuator, Integral Pivot with pivot post. Mounted on plate for extended shaft with Shaft Clevis and Crank for 3/8” (10 mm), 7/16” (11 mm), 1/2” (13 mm) diameter shaft. |
| 331-4810 | Front | 8-13 psi (55-90 kPa) | Actuator |
| 331-4813 | Fixed | 8-13 psi (55-90 kPa) | Actuator, Bracket |
| 331-4812 | Pivot | 8-13 psi (55-90 kPa) | Actuator, Integral Pivot |
| 332-4811 | Extended Shaft with Positioning Relay | 8-13 psi (55-90 kPa) | Actuator, Integral Pivot with pivot post. Mounted on plate for extended shaft with Clevis and Crank for 3/8” (10 mm), 7/16” (11 mm), 1/2” (13 mm) diameter shaft. |
