Siemens Building Technology A266.530 120V Modulating Industrial Electric Actuator 530 lb-in

The Siemens A266.530 is a 120V modulating quarter-turn industrial electric actuator engineered for precise valve control in commercial and industrial HVAC and building automation systems. Designed as part of Siemens' proven A-Series actuator lineup, it delivers reliable, repeatable positioning for butterfly valve applications.

This actuator provides up to 530 lb-in (60 Nm) of torque and mounts directly to Siemens resilient seat butterfly valves without the need for additional brackets or linkages, simplifying installation and reducing potential failure points. The modulating control configuration allows for proportional positioning across the full 90-degree quarter-turn range based on an analog input command signal (0–10 Vdc).

Key Features:

• 120V AC single-phase supply voltage
• Modulating (proportional) control via 0–10 Vdc analog signal
• 530 lb-in (60 Nm) output torque
• Quarter-turn (90°) operation
• NEMA 4X and IP65-rated weatherproof housing
• Standard operating speed of 30 seconds (60 Hz)
• Built-in heater to prevent internal condensation
• Direct-mount design — no brackets or linkages required
• Externally adjustable end stops at 0° and 90°
• CSA certified; CE compliant

The A266.530 is the ideal actuator for modulating control of Siemens resilient seat butterfly valves in hydronic systems handling hot water, chilled water, condenser water, and glycol solutions. The robust NEMA 4X / IP65 enclosure makes it suitable for demanding environments where moisture or dust ingress is a concern.