EFB24-SR N4 | Belimo 270 In Lb Spring Return Modulating Damper Actuator NEMA 4

Belimo · Motors & Motion

Description  The Belimo EFB24-SR N4 is a high-torque spring return damper actuator delivering 270 in-lb of force for precise modulating airflow control. Operating on AC/DC 24 V with a 2…10 V control signal, it provides reliable fail-safe performance in demanding HVAC and industrial environments.     Technical Specifications  Condition New/Never Used Surplus Brand Belimo Category Actuators & Dampers Part Number EFB24-SR N4 Subcategory Damper Actuators Actuator Type Spring return, modulating Nominal Torque 270 in-lb (30 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) 8 W Power Consumption (Rest) 4.5 W Transformer Sizing 14 VA Angle of Rotation Adjustable 35…95° Running Time 95 s / 90° Fail-Safe Running Time <20 s Electrical Connection Terminal blocks in NEMA 4 junction box Degree of Protection IP66 / NEMA 4 Ambient Temperature -22…122°F (-30…50°C) Weight 12 lb (5.3 kg)   Information About EFB24-SR N4 The EFB24-SR N4 is part of Belimo’s heavy-duty spring return damper actuator range engineered for applications requiring high torque and enhanced environmental protection. It features a sealed enclosure rated IP66 and NEMA 4, supporting installation in wash-down areas, outdoor locations, and harsh mechanical environments. The actuator operates on AC/DC 24 V and supports precise modulating control with 2…10 V input, along with position feedback for closed-loop control systems. Designed for maintenance-free service, it combines robust mechanical construction with electronic overload protection to ensure reliable long-term performance. Key Features High Torque Spring Return Actuation: Delivers 270 in-lb (30 Nm) of torque to reliably operate large or high-resistance dampers under demanding conditions. Fail-Safe Spring Return Function: Integrated spring mechanism automatically drives the damper to a predefined safety position during power loss. Precise Modulating Control Capability: Supports 2…10 V control signals with optional 4…20 mA input for accurate and stable airflow modulation. Rugged Environmental Protection: IP66 and NEMA 4 enclosure ratings protect internal components from dust, moisture, and wash-down exposure. Adjustable Mechanical Stroke: Mechanical end stops allow angle-of-rotation adjustment between 35° and 95° to match damper travel requirements. Integrated Position Feedback: Provides a 2…10 V feedback signal for continuous damper position monitoring and control optimization. Service-Friendly Design: Includes a 5 mm hex manual override and electronic overload protection for safe commissioning and dependable operation. The EFB24-SR N4 delivers the reliability and precision required for high-torque, fail-safe, and modulating damper control in commercial and industrial HVAC systems.

Brand: Belimo · Category: Motors & Motion

Key features

• High Torque Spring Return Actuation: Delivers 270 in-lb (30 Nm) of torque to reliably operate large or high-resistance dampers under demanding conditions.
• Fail-Safe Spring Return Function: Integrated spring mechanism automatically drives the damper to a predefined safety position during power loss.
• Precise Modulating Control Capability: Supports 2…10 V control signals with optional 4…20 mA input for accurate and stable airflow modulation.
• Rugged Environmental Protection: IP66 and NEMA 4 enclosure ratings protect internal components from dust, moisture, and wash-down exposure.
• Adjustable Mechanical Stroke: Mechanical end stops allow angle-of-rotation adjustment between 35° and 95° to match damper travel requirements.
• Integrated Position Feedback: Provides a 2…10 V feedback signal for continuous damper position monitoring and control optimization.
• Service-Friendly Design: Includes a 5 mm hex manual override and electronic overload protection for safe commissioning and dependable operation.

Specifications

Contact Safety Shops for pricing, delivery and project support in the UAE.