LF24-SR US | Belimo 35 In Lb Spring Return Modulating Damper Actuator 24V

Belimo · Motors & Motion

Description  The Belimo LF24-SR US is a compact spring return damper actuator providing 35 in-lb of torque for precise modulating control. It operates on AC/DC 24 V and supports fail-safe positioning for reliable airflow control in HVAC systems.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Damper Actuators Part Number LF24-SR US Subcategory Spring Return Actuators Actuator Type Spring return, modulating Nominal Torque 35 in-lb (4 Nm) Nominal Voltage AC/DC 24 V Nominal Frequency 50/60 Hz Voltage Range AC 19.2…28.8 V / DC 21.6…28.8 V Control Signal 2…10 V (4…20 mA with resistor) Power Consumption (Running) 2.5 W Power Consumption (Rest) 1 W Transformer Sizing 5 VA Angle of Rotation Max. 95° Running Time 150 s / 90° Fail-Safe Running Time <25 s Electrical Connection 18 GA plenum cable, 3 ft, 1/2" NPT conduit Degree of Protection IP54 / NEMA 2 Ambient Temperature -22…122°F (-30…50°C) Weight 3.4 lb (1.6 kg)   Information About LF24-SR US The LF24-SR US is part of Belimo’s compact damper actuator series designed for accurate airflow modulation and dependable fail-safe operation. It delivers 35 in-lb of torque and features a spring return mechanism that drives the damper to a predefined safety position upon power loss. The actuator supports modulating control via a 2…10 V signal and provides position feedback for integration with building automation systems. Its maintenance-free construction and integrated overload protection ensure consistent long-term performance in HVAC installations. Key Features Spring Return Safety Function: Integrated spring mechanism provides automatic fail-safe positioning during power interruption. Precise Modulating Control: Supports 2…10 V control signals with optional 4…20 mA input using an external resistor. Compact Torque Output: Delivers 35 in-lb of torque suitable for small to medium-sized air control dampers. Selectable Direction Of Rotation: Motor and fail-safe direction can be configured through mounting orientation and onboard switch. Integrated Position Feedback: Provides 2…10 V feedback signal for accurate damper position monitoring. Quiet Operation: Low motor noise level of 30 dB(A) supports use in noise-sensitive HVAC environments. Durable And Protected Design: IP54 and NEMA 2 ratings protect internal components from dust and incidental moisture. The LF24-SR US delivers the reliability and precision required for safe and accurate damper control in commercial HVAC systems.

Brand: Belimo · Category: Motors & Motion

Key features

• Spring Return Safety Function: Integrated spring mechanism provides automatic fail-safe positioning during power interruption.
• Precise Modulating Control: Supports 2…10 V control signals with optional 4…20 mA input using an external resistor.
• Compact Torque Output: Delivers 35 in-lb of torque suitable for small to medium-sized air control dampers.
• Selectable Direction Of Rotation: Motor and fail-safe direction can be configured through mounting orientation and onboard switch.
• Integrated Position Feedback: Provides 2…10 V feedback signal for accurate damper position monitoring.
• Quiet Operation: Low motor noise level of 30 dB(A) supports use in noise-sensitive HVAC environments.
• Durable And Protected Design: IP54 and NEMA 2 ratings protect internal components from dust and incidental moisture.

Specifications

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