SY4-24 | Belimo Heavy Duty Valve Actuator 24V Non Fail Safe With Auxiliary Switches

Belimo · Motors & Motion

Description  The Belimo SY4-24 is a heavy-duty valve actuator designed for high-torque on/off and floating point control in hydronic HVAC systems. It operates on AC/DC 24 V power and delivers 400 Nm of torque for reliable actuation of large valves in demanding applications.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Control Valves Part Number SY4-24 Subcategory Valve Actuators Nominal Voltage AC/DC 24 V Nominal Frequency 50/60 Hz Voltage Range AC/DC 21.6…26.4 V Transformer Sizing 226 VA Current Consumption 9.4 A Control Type On/Off, Floating Point Torque Output 400 Nm Angle of Rotation 90° Running Time 20 s Duty Cycle 30% Auxiliary Switches 2x SPDT Switching Capacity 1 mA…5 A (3 A inductive) Electrical Connection Terminal blocks Overload Protection Thermal, 135°C cut-out Degree of Protection IP66/67, NEMA 4X Ambient Temperature -30…65°C Ambient Humidity Up to 100% RH Weight 46 lb (21 kg)   Information About SY4-24 The SY4-24 is part of Belimo’s industrial-grade valve actuator range developed for precise and reliable control of large hydronic valves. It features a powerful motor with thermal overload protection and an internal resistive heating element to manage humidity in harsh environments. The actuator supports on/off and floating point control modes, allowing integration with a wide range of building automation systems. A rugged NEMA 4X enclosure and terminal block connections make it suitable for indoor and outdoor installations where durability and reliability are critical. Key Features High Torque Output: Delivers 400 Nm of torque to reliably actuate large control valves in high-demand HVAC and industrial hydronic systems. Non Fail Safe Operation: Provides powered valve positioning without spring return, suitable for applications where fail-safe action is not required. On Off And Floating Point Control: Supports simple and robust control strategies commonly used in large valve applications. Dual Auxiliary SPDT Switches: Includes two factory-installed switches for position indication, sequencing, and system interlocking. Thermal And Humidity Protection: Equipped with thermal overload cut-out and internal heating element to ensure stable operation in extreme conditions. Manual Hand Wheel Override: Allows local valve positioning during commissioning, maintenance, or power interruptions. Rugged NEMA 4X Enclosure: IP66/67 rated housing protects against dust, water ingress, and corrosion in demanding environments. The SY4-24 delivers the reliability and precision required for high-torque valve control in commercial and industrial HVAC systems.

Brand: Belimo · Category: Motors & Motion

Key features

• High Torque Output: Delivers 400 Nm of torque to reliably actuate large control valves in high-demand HVAC and industrial hydronic systems.
• Non Fail Safe Operation: Provides powered valve positioning without spring return, suitable for applications where fail-safe action is not required.
• On Off And Floating Point Control: Supports simple and robust control strategies commonly used in large valve applications.
• Dual Auxiliary SPDT Switches: Includes two factory-installed switches for position indication, sequencing, and system interlocking.
• Thermal And Humidity Protection: Equipped with thermal overload cut-out and internal heating element to ensure stable operation in extreme conditions.
• Manual Hand Wheel Override: Allows local valve positioning during commissioning, maintenance, or power interruptions.
• Rugged NEMA 4X Enclosure: IP66/67 rated housing protects against dust, water ingress, and corrosion in demanding environments.

Specifications

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