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EFB24-SR | Belimo Modulating Spring Return Damper Actuator 270 In Lb 24V
- Regular price
- $1,054.00
- Sale price
- $1,054.00
- Regular price
-
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Product Description P/N: EFB24-SR
Description
The Belimo EFB24-SR is a high-torque spring return damper actuator delivering 270 in-lb (30 Nm) for precise modulating airflow control. It operates on AC/DC 24 V power and supports 2–10 V control with integrated position feedback and fail-safe functionality.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Dampers & Actuators |
| Part Number | EFB24-SR |
| Subcategory | Damper Actuators |
| 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 |
| Power Consumption (Operation) | 8 W |
| Power Consumption (Rest) | 4.5 W |
| Transformer Sizing | 14 VA |
| Control Signal | 2…10 V (4…20 mA with resistor) |
| Input Impedance | 100 kΩ (2…10 V), 500 Ω (4…20 mA) |
| Position Feedback | 2…10 V |
| Torque Output | 270 in-lb (30 Nm) |
| Angle of Rotation | 35…95°, adjustable |
| Running Time (Motor) | 95 s / 90° |
| Running Time (Fail-Safe) | <20 s @ -20…50°C |
| Electrical Connection | 18 GA cable, 1 m, 1/2" NPT |
| Degree of Protection | IP54 / NEMA 2 |
| Noise Level | 56 dB(A) motor |
| Weight | 11 lb (5.1 kg) |
Information About EFB24-SR
The EFB24-SR is part of Belimo’s EFB series of high-torque spring return actuators developed for demanding commercial HVAC damper applications. It features a double-insulated housing with electronic overload protection across the full 0–95° rotation range to ensure consistent torque output and long service life. The actuator supports modulating control via a 2…10 V signal and can be configured for 4…20 mA operation using an external resistor, enabling compatibility with modern building automation systems. Adjustable mechanical end stops, selectable motor direction, and reversible fail-safe action provide installation flexibility and precise damper control.
Key Features
- Spring Return Fail-Safe Operation: Integrated spring mechanism automatically drives the damper to a defined safety position during power loss to support system protection and operational safety.
- High Torque Performance: Delivers a constant 270 in-lb (30 Nm) torque output suitable for large or high-pressure air damper applications.
- Modulating Control Interface: Accepts a 2…10 V control signal with optional 4…20 mA capability for accurate proportional airflow regulation.
- Electronic Overload Protection: Protects internal components throughout the full rotation range by preventing damage from mechanical obstruction or excessive load.
- Adjustable Rotation Range: Mechanical end stops allow precise setting of rotation limits between 35° and 95° to match damper requirements.
- Selectable And Reversible Operation: Motor rotation direction is selectable via onboard switch, while fail-safe direction is reversible through CW or CCW mounting.
- Manual Override Capability: Supplied with a hex crank to allow manual positioning during commissioning, testing, or maintenance.
The EFB24-SR delivers the reliability and precision required for high-torque modulating airflow control and dependable fail-safe damper operation in HVAC systems.
Description
The Belimo EFB24-SR is a high-torque spring return damper actuator delivering 270 in-lb (30 Nm) for precise modulating airflow control. It operates on AC/DC 24 V power and supports 2–10 V control with integrated position feedback and fail-safe functionality.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Dampers & Actuators |
| Part Number | EFB24-SR |
| Subcategory | Damper Actuators |
| 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 |
| Power Consumption (Operation) | 8 W |
| Power Consumption (Rest) | 4.5 W |
| Transformer Sizing | 14 VA |
| Control Signal | 2…10 V (4…20 mA with resistor) |
| Input Impedance | 100 kΩ (2…10 V), 500 Ω (4…20 mA) |
| Position Feedback | 2…10 V |
| Torque Output | 270 in-lb (30 Nm) |
| Angle of Rotation | 35…95°, adjustable |
| Running Time (Motor) | 95 s / 90° |
| Running Time (Fail-Safe) | <20 s @ -20…50°C |
| Electrical Connection | 18 GA cable, 1 m, 1/2" NPT |
| Degree of Protection | IP54 / NEMA 2 |
| Noise Level | 56 dB(A) motor |
| Weight | 11 lb (5.1 kg) |
Information About EFB24-SR
The EFB24-SR is part of Belimo’s EFB series of high-torque spring return actuators developed for demanding commercial HVAC damper applications. It features a double-insulated housing with electronic overload protection across the full 0–95° rotation range to ensure consistent torque output and long service life. The actuator supports modulating control via a 2…10 V signal and can be configured for 4…20 mA operation using an external resistor, enabling compatibility with modern building automation systems. Adjustable mechanical end stops, selectable motor direction, and reversible fail-safe action provide installation flexibility and precise damper control.
Key Features
- Spring Return Fail-Safe Operation: Integrated spring mechanism automatically drives the damper to a defined safety position during power loss to support system protection and operational safety.
- High Torque Performance: Delivers a constant 270 in-lb (30 Nm) torque output suitable for large or high-pressure air damper applications.
- Modulating Control Interface: Accepts a 2…10 V control signal with optional 4…20 mA capability for accurate proportional airflow regulation.
- Electronic Overload Protection: Protects internal components throughout the full rotation range by preventing damage from mechanical obstruction or excessive load.
- Adjustable Rotation Range: Mechanical end stops allow precise setting of rotation limits between 35° and 95° to match damper requirements.
- Selectable And Reversible Operation: Motor rotation direction is selectable via onboard switch, while fail-safe direction is reversible through CW or CCW mounting.
- Manual Override Capability: Supplied with a hex crank to allow manual positioning during commissioning, testing, or maintenance.
The EFB24-SR delivers the reliability and precision required for high-torque modulating airflow control and dependable fail-safe damper operation in HVAC systems.
