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Belimo LRB24-SR Modulating Rotary Damper Actuator 45 in-lb 24V Non-Spring Return
- Regular price
- $265.00
- Sale price
- $265.00
- Regular price
-
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Product Description P/N: LRB24-SR
Description
The Belimo LRB24-SR is a compact, non-spring return rotary damper actuator engineered to provide modulating control in commercial heating, ventilation, and air conditioning systems. Operating on a standard 24 VAC or VDC power supply, this unit utilizes a proportional 2 to 10 VDC control signal to achieve precise airflow calibration. It delivers 45 in-lb of torque to reliably position dampers in varying environmental conditions while minimizing mechanical wear.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | HVAC Parts |
| Part Number | LRB24-SR |
| Subcategory | Damper Actuators |
| Actuator Type | Modulating, Non-Spring Return |
| Torque Output | 45 in-lb (5 Nm) |
| Power Supply | 24 VAC / VDC |
| Power Frequency | 50/60 Hz |
| Control Signal | 2 to 10 VDC |
| Power Consumption (Running) | 1.5 Watts |
| Transformer Sizing | 3 VA |
| Enclosure Rating | NEMA 2 / IP54 |
| Motor Technology | Brushless DC Motor |
| Manual Override | External Push Button |
| Weight | 1.1 lbs |
Information About LRB24-SR
The LRB24-SR is a direct-coupled electromechanical device designed for seamless integration into advanced building management networks requiring accurate pneumatic or airflow modulation. It features a robust, low-profile NEMA 2 enclosure that protects the internal brushless DC motor from dust and typical mechanical room moisture. The actuator mounts directly onto standard damper shafts using a universal V-bolt clamp, which eliminates the necessity for complex linkage assemblies and reduces installation time. Building technicians rely on this modulating drive to interpret variable voltage signals and continuously adjust damper blades to maintain strict indoor air quality and static pressure parameters.
Key Features:
- Modulating Control Interface: Interprets 2 to 10 VDC or 4 to 20 mA signals to provide variable, proportional positioning of the damper blade.
- Brushless DC Motor: Ensures continuous, friction-reduced operation that extends the mechanical lifespan of the actuator without requiring scheduled maintenance.
- Electronic Overload Protection: Halts motor rotation safely when the damper reaches its physical limits to prevent internal component damage or gear stripping.
- Low Voltage Operation: Runs efficiently on 24 VAC or VDC power supplies to integrate smoothly with standard commercial temperature control boards.
- Direct-Coupled Installation: Attaches straight to round or square shafts using a standardized clamp, minimizing required hardware and mechanical footprint.
- Visual Position Indicator: Features an integrated mechanical dial on the chassis to allow technicians to confirm the current damper position at a glance.
- Push-Button Manual Override: Disengages the internal gear train to allow for manual damper adjustments during power outages or system diagnostics.
The LRB24-SR delivers the reliability and precision required for exact airflow calibration and continuous modulation in responsive commercial ventilation systems.
Description
The Belimo LRB24-SR is a compact, non-spring return rotary damper actuator engineered to provide modulating control in commercial heating, ventilation, and air conditioning systems. Operating on a standard 24 VAC or VDC power supply, this unit utilizes a proportional 2 to 10 VDC control signal to achieve precise airflow calibration. It delivers 45 in-lb of torque to reliably position dampers in varying environmental conditions while minimizing mechanical wear.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | HVAC Parts |
| Part Number | LRB24-SR |
| Subcategory | Damper Actuators |
| Actuator Type | Modulating, Non-Spring Return |
| Torque Output | 45 in-lb (5 Nm) |
| Power Supply | 24 VAC / VDC |
| Power Frequency | 50/60 Hz |
| Control Signal | 2 to 10 VDC |
| Power Consumption (Running) | 1.5 Watts |
| Transformer Sizing | 3 VA |
| Enclosure Rating | NEMA 2 / IP54 |
| Motor Technology | Brushless DC Motor |
| Manual Override | External Push Button |
| Weight | 1.1 lbs |
Information About LRB24-SR
The LRB24-SR is a direct-coupled electromechanical device designed for seamless integration into advanced building management networks requiring accurate pneumatic or airflow modulation. It features a robust, low-profile NEMA 2 enclosure that protects the internal brushless DC motor from dust and typical mechanical room moisture. The actuator mounts directly onto standard damper shafts using a universal V-bolt clamp, which eliminates the necessity for complex linkage assemblies and reduces installation time. Building technicians rely on this modulating drive to interpret variable voltage signals and continuously adjust damper blades to maintain strict indoor air quality and static pressure parameters.
Key Features:
- Modulating Control Interface: Interprets 2 to 10 VDC or 4 to 20 mA signals to provide variable, proportional positioning of the damper blade.
- Brushless DC Motor: Ensures continuous, friction-reduced operation that extends the mechanical lifespan of the actuator without requiring scheduled maintenance.
- Electronic Overload Protection: Halts motor rotation safely when the damper reaches its physical limits to prevent internal component damage or gear stripping.
- Low Voltage Operation: Runs efficiently on 24 VAC or VDC power supplies to integrate smoothly with standard commercial temperature control boards.
- Direct-Coupled Installation: Attaches straight to round or square shafts using a standardized clamp, minimizing required hardware and mechanical footprint.
- Visual Position Indicator: Features an integrated mechanical dial on the chassis to allow technicians to confirm the current damper position at a glance.
- Push-Button Manual Override: Disengages the internal gear train to allow for manual damper adjustments during power outages or system diagnostics.
The LRB24-SR delivers the reliability and precision required for exact airflow calibration and continuous modulation in responsive commercial ventilation systems.