AF24-SR US | Belimo Spring Return Proportional Damper Actuator 24V 15 Nm

Belimo · Motors & Motion

Description  The Belimo AF24-SR US is a proportional spring-return damper actuator designed to deliver 15 Nm of constant torque for accurate airflow control in HVAC systems. It operates on AC/DC 24 V power and supports both 2–10 VDC and 4–20 mA control signals with integrated position feedback.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Dampers & Actuators Part Number AF24-SR US Subcategory Damper Actuators Power Supply 24 VAC ±20% / 24 VDC ±10% Nominal Frequency 50/60 Hz Power Consumption (Running) 6 W Power Consumption (Holding) 2 W Transformer Sizing 10 VA, Class 2 Control Signal 2…10 VDC, 4…20 mA Input Impedance 100 kΩ (0.1 mA), 500 Ω Feedback Output 2…10 VDC, max. 0.5 mA Torque Output 133 in-lb (15 Nm) Angle of Rotation 0…95°, mechanically limited Running Time (Motor) 150 s constant Running Time (Spring Return) <20 s Electrical Connection 18 GA cable, 3 ft, 1/2" conduit Housing Rating NEMA 2 / IP54 Ambient Temperature -30…50°C Noise Level Max. 45 dB(A) Weight 6.0 lb (2.7 kg)   Information About AF24-SR US The AF24-SR US is part of Belimo’s AF series of spring-return actuators engineered for reliable proportional damper control in commercial HVAC installations. It features a zinc-coated metal housing with electronic overload protection throughout the full 0–95° rotation range, ensuring consistent torque and long operational life. The actuator accepts both voltage and current control signals, allowing flexible integration with a wide range of building automation systems. Reversible motor and spring rotation, visual position indication, and maintenance-free design support efficient installation and dependable long-term operation. Key Features Spring Return Fail-Safe Operation: Integrated spring mechanism automatically drives the damper to a defined safety position upon power loss, supporting system protection and code compliance. Proportional Control Capability: Supports both 2…10 VDC and 4…20 mA control signals, enabling precise modulation of damper position in response to control demands. Constant 15 Nm Torque Output: Delivers stable 133 in-lb torque across the entire operating range, ensuring reliable damper movement regardless of load variations. Integrated Position Feedback: Provides a 2…10 VDC output signal for continuous damper position monitoring and closed-loop control applications. Reversible Direction of Rotation: Motor direction is selectable via built-in switch, while spring return direction is configurable through CW or CCW mounting. Manual Override Function: Supplied with a hex crank to allow manual damper positioning during commissioning, testing, or power interruptions. Durable Enclosed Construction: Zinc-coated metal housing rated NEMA 2 / IP54 protects internal components in mechanical room and air-handling environments. The AF24-SR US delivers the reliability and precision required for proportional airflow control and dependable fail-safe damper operation in HVAC systems.

Brand: Belimo · Category: Motors & Motion

Key features

• Spring Return Fail-Safe Operation: Integrated spring mechanism automatically drives the damper to a defined safety position upon power loss, supporting system protection and code compliance.
• Proportional Control Capability: Supports both 2…10 VDC and 4…20 mA control signals, enabling precise modulation of damper position in response to control demands.
• Constant 15 Nm Torque Output: Delivers stable 133 in-lb torque across the entire operating range, ensuring reliable damper movement regardless of load variations.
• Integrated Position Feedback: Provides a 2…10 VDC output signal for continuous damper position monitoring and closed-loop control applications.
• Reversible Direction of Rotation: Motor direction is selectable via built-in switch, while spring return direction is configurable through CW or CCW mounting.
• Manual Override Function: Supplied with a hex crank to allow manual damper positioning during commissioning, testing, or power interruptions.
• Durable Enclosed Construction: Zinc-coated metal housing rated NEMA 2 / IP54 protects internal components in mechanical room and air-handling environments.

Specifications

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