TFRB24-SR | Belimo Spring Return Valve Actuator Modulating 24 V AC DC

Belimo · Motors & Motion

Description  The Belimo TFRB24-SR is a spring return valve actuator designed for modulating control in HVAC and building automation systems. It operates on AC/DC 24 V and supports proportional control signals for precise and reliable damper or valve positioning.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category HVAC Control Components Part Number TFRB24-SR Subcategory Valve Actuators Actuator Type Spring Return, Modulating Nominal Voltage AC/DC 24 V Frequency 50/60 Hz Voltage Range AC 19.2–28.8 V / DC 21.6–28.8 V Power Consumption (Operation) 2.5 W Power Consumption (Rest) 1 W Transformer Sizing 4 VA Control Signal 2–10 V (4–20 mA with external resistor) Input Impedance 100 kΩ (2–10 V), 500 Ω (4–20 mA) Position Feedback 2–10 V, max. 0.5 mA Angle of Rotation Max. 95° Running Time (Motor) 95 s Running Time (Fail-Safe) <25 s @ 20°C Degree of Protection IP42 / NEMA 2 Ambient Temperature −30…50°C Storage Temperature −40…80°C Weight 0.69 kg   Information About TFRB24-SR The TFRB24-SR is a Belimo spring return actuator engineered for applications requiring controlled modulation combined with a defined fail-safe position. It supports proportional voltage control and optional current input, allowing flexible integration into modern HVAC control architectures. The actuator incorporates an internal spring mechanism that drives the device to a safe position upon power loss, enhancing system safety and reliability. Its compact housing, selectable direction of rotation, and factory-installed cable simplify installation and commissioning in control panels and mechanical systems. Key Features Spring return fail-safe operation: Automatically drives the actuator to a predefined safety position during power loss to protect equipment and system operation. Proportional modulating control: Supports 2–10 V control signals, with optional 4–20 mA input capability for flexible control integration. Selectable rotation direction: Motor direction can be configured via switch, while fail-safe direction is adjustable through mounting orientation. Integrated position feedback: Provides a 2–10 V feedback signal for real-time position monitoring and closed-loop control. Quiet motor performance: Low operating noise supports installation in occupied or noise-sensitive environments. Electronic overload protection: Protects the actuator throughout the full rotation range to enhance durability and service life. Maintenance-free design: Engineered for long-term operation without periodic servicing requirements. The TFRB24-SR delivers the reliability and precision required for safe, accurate modulating control of valves and dampers in HVAC and building automation systems.

Brand: Belimo · Category: Motors & Motion

Key features

• Spring return fail-safe operation: Automatically drives the actuator to a predefined safety position during power loss to protect equipment and system operation.
• Proportional modulating control: Supports 2–10 V control signals, with optional 4–20 mA input capability for flexible control integration.
• Selectable rotation direction: Motor direction can be configured via switch, while fail-safe direction is adjustable through mounting orientation.
• Integrated position feedback: Provides a 2–10 V feedback signal for real-time position monitoring and closed-loop control.
• Quiet motor performance: Low operating noise supports installation in occupied or noise-sensitive environments.
• Electronic overload protection: Protects the actuator throughout the full rotation range to enhance durability and service life.
• Maintenance-free design: Engineered for long-term operation without periodic servicing requirements.

Specifications

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