Belimo SY4-110 Actuator

The Belimo SY4-110 Actuator is a robust, high-torque non-spring return industrial solution designed for high-performance butterfly and ball valve applications. Delivering 3560 in-lb of torque, this 120Vac on/off actuator provides the necessary mechanical force to overcome high differential pressures and seat friction in heavy-duty HVACR piping systems. Built with a NEMA 4X enclosure, the unit is engineered to withstand demanding environments, offering superior protection against corrosion and moisture ingress. The SY4-110 industrial actuator utilizes a reliable gear train and thermal overload protection to ensure consistent operation during high-duty cycles. For contractors and technicians, this motor represents a standardized solution for heavy-duty valve automation where precise flow control and long-term durability are critical. Compatibility with Belimo butterfly valves ensures a seamless mechanical interface, reducing installation time and mitigating common field-alignment issues frequently encountered with third-party mounting kits.

• High Torque Output: Provides 3560 in-lb (400 Nm) to handle large-diameter valve assemblies without stalling.
• Industrial Protection: NEMA 4X / IP67 rated housing allows for installation in wash-down or outdoor environments.
• Simplified Wiring: 120Vac operation integrates directly into standard line-voltage control circuits.
• Manual Override: Features a handwheel for manual positioning during power loss or system commissioning.
• Internal Limit Switches: Factory-set travel switches prevent over-rotation and simplify field setup.

Common Questions

What is the duty cycle for the Belimo SY series?
The SY4-110 is rated for a 30% duty cycle, making it ideal for standard on/off isolation applications and infrequent modulation cycles.

Can this actuator be mounted in any orientation?
While versatile, it is recommended to install the actuator in a vertical position above the valve; avoid mounting the unit upside down to prevent internal moisture accumulation.

Is the handwheel active during powered operation?
No, the handwheel is part of a declutchable mechanism to ensure technician safety and prevent mechanical binding during automated cycles.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.