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LF24-S US | Belimo Spring Return Damper Actuator 35 In Lb 24VACDC On Off
- Regular price
- $356.00
- Sale price
- $356.00
- Regular price
-
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Product Description P/N: LF24-S US
Description
The Belimo LF24-S US is a spring return damper actuator designed for dependable on/off control in HVAC air distribution systems. Operating on 24 VAC/DC power, it provides 35 in-lb torque and consistent fail-safe performance for controlled damper positioning.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Damper Actuators |
| Part Number | LF24-S US |
| Subcategory | Spring Return Damper Actuators |
| Actuator Type | Damper Actuator |
| Control Type | On/Off |
| 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 |
| Torque Output | 35 in-lb (4 Nm) |
| Spring Return | Yes |
| Power Consumption (Operation) | 5 W |
| Power Consumption (Rest) | 2.5 W |
| Transformer Sizing | 7 VA |
| Auxiliary Switch | 1 × SPDT, adjustable 0…95° |
| Angle of Rotation | Max. 95° |
| Running Time | 75 s / 90° |
| Protection Rating | IP54, NEMA 2 |
| Ambient Temperature | -22…122°F (-30…50°C) |
| Weight | 3.7 lb (1.7 kg) |
Information About LF24-S US
The LF24-S US is part of Belimo’s compact spring return damper actuator series developed for reliable airflow control and safety positioning. It incorporates an internal spring mechanism that automatically drives the damper to a defined position during power loss, supporting system protection requirements. The actuator includes an adjustable SPDT auxiliary switch and electronic overload protection to ensure accurate signaling and long-term operational stability. Designed for commercial HVAC installations, it complies with UL and CSA standards and is suitable for plenum-rated applications.
Key Features
- 35 in-lb Torque Output: Provides sufficient force for consistent operation of small to medium-sized air dampers.
- Spring Return Safety Function: Automatically moves the damper to a fail-safe position upon power interruption.
- 24 VAC/DC Power Supply: Compatible with standard low-voltage HVAC control systems.
- On/Off Control Operation: Supports simple binary damper control for ventilation and zoning functions.
- Integrated Auxiliary Switch: One adjustable SPDT switch enables position feedback or interlock signaling.
- Electronic Overload Protection: Protects the actuator across the full rotation range to extend service life.
- Selectable Rotation Direction: Allows flexible clockwise or counterclockwise mounting configurations.
The LF24-S US delivers the reliability and precision required for safe and consistent spring return damper control in commercial HVAC airflow management systems.
Description
The Belimo LF24-S US is a spring return damper actuator designed for dependable on/off control in HVAC air distribution systems. Operating on 24 VAC/DC power, it provides 35 in-lb torque and consistent fail-safe performance for controlled damper positioning.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Damper Actuators |
| Part Number | LF24-S US |
| Subcategory | Spring Return Damper Actuators |
| Actuator Type | Damper Actuator |
| Control Type | On/Off |
| 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 |
| Torque Output | 35 in-lb (4 Nm) |
| Spring Return | Yes |
| Power Consumption (Operation) | 5 W |
| Power Consumption (Rest) | 2.5 W |
| Transformer Sizing | 7 VA |
| Auxiliary Switch | 1 × SPDT, adjustable 0…95° |
| Angle of Rotation | Max. 95° |
| Running Time | 75 s / 90° |
| Protection Rating | IP54, NEMA 2 |
| Ambient Temperature | -22…122°F (-30…50°C) |
| Weight | 3.7 lb (1.7 kg) |
Information About LF24-S US
The LF24-S US is part of Belimo’s compact spring return damper actuator series developed for reliable airflow control and safety positioning. It incorporates an internal spring mechanism that automatically drives the damper to a defined position during power loss, supporting system protection requirements. The actuator includes an adjustable SPDT auxiliary switch and electronic overload protection to ensure accurate signaling and long-term operational stability. Designed for commercial HVAC installations, it complies with UL and CSA standards and is suitable for plenum-rated applications.
Key Features
- 35 in-lb Torque Output: Provides sufficient force for consistent operation of small to medium-sized air dampers.
- Spring Return Safety Function: Automatically moves the damper to a fail-safe position upon power interruption.
- 24 VAC/DC Power Supply: Compatible with standard low-voltage HVAC control systems.
- On/Off Control Operation: Supports simple binary damper control for ventilation and zoning functions.
- Integrated Auxiliary Switch: One adjustable SPDT switch enables position feedback or interlock signaling.
- Electronic Overload Protection: Protects the actuator across the full rotation range to extend service life.
- Selectable Rotation Direction: Allows flexible clockwise or counterclockwise mounting configurations.
The LF24-S US delivers the reliability and precision required for safe and consistent spring return damper control in commercial HVAC airflow management systems.
