Siemens Building Technology 331-2856 Actuator R-22 and VP-3F side wall vent

and VP-3F side wall vent systems

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

Smith unit stays in a lockout loop

Heavy-Duty Bore Design: The 1/2" intake-side bore provides a secure fit on the motor shaft

Pilot Duty Efficiency: Optimized for low-voltage control

Siemens Building Technology 331-2856 Actuator R-22 and VP-3F side wall ventThe 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,