SA905-S Fail-Safe Electric Thermal Actuator

Compared with conventional wax thermal actuators, the stepper motor drive provides faster response times, precise valve positioning, and more stable flow control for modern hydronic systems. This enables superior temperature regulation and system responsiveness in dynamic operating conditions.

The integrated supercapacitor backup system automatically executes a predefined safety action during power failures, helping protect PICV and hydronic control systems from uncontrolled operation. No external battery or UPS required — the supercapacitor is self-contained and maintenance-free.

After power restoration, the actuator automatically returns to normal operating mode without manual intervention, improving system availability and reducing maintenance workload. No on-site service calls required after power events.

Integrated LED indicators provide clear visual feedback of actuator operating status, simplifying commissioning, troubleshooting, and routine service operations. Technicians can instantly confirm valve position without opening electrical panels or using diagnostic tools.

The standard M30×1.5 connection enables direct installation on most PICV and hydronic control valves without additional adapters or system modifications. This makes retrofit projects faster, simpler, and more cost-effective.

The IP54-rated enclosure protects against dust and water splashes, ensuring reliable long-term operation in plant rooms, manifold cabinets, and hydronic installations with high humidity or exposure.