Siemens Building Technology 331-2856 Actuator R-22 this seal provides the reliability

this seal provides the reliability required for continuous-duty Aurora centrifugal pumps

Does this unit require a separate vent limiter

Key Benefits Wrapped Construction: Provides smoother

including the solenoid plunger spring

Siemens Building Technology 331-2856 Actuator R-22 this seal provides the reliabilityThe Siemens 331 2856 is a heavy duty Powers Controls No. 6 pneumatic actuator designed for reliable linear control of large dampers, centrifugal refrigeration inlet vanes, and multi section ventilation systems. This pneumatic damper actuator features a rugged, all metal body construction to withstand demanding mechanical environments. It operates on a nominal 8 13 psi spring range, providing the high torque performance required for outdoor air,