Siemens Building Technology 331-2856 Actuator 323055-751 as the M520 does not

as the M520 does not include an integral high-fire regulator

and Payne industrial units

Calibration Stability: The liquid-filled element ensures the setpoint remains accurate despite changes in surrounding ambient temperatures

it is plug-and-play for compatible York

Robust Construction: Manufactured from heavy-duty galvanized steel to resist corrosion and structural fatigue under high-heat conditions

Siemens Building Technology 331-2856 Actuator 323055-751 as the M520 does notThe 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,