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Belimo LR24A-SR 24V Modulating Rotary Valve Actuator, 5 Nm, 2–10 VDC Control With Position Feedback
- Regular price
- $355.00
- Sale price
- $355.00
- Regular price
-
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Product Description P/N: LR24A-SR
Description
The Belimo LR24A-SR is a modulating rotary valve actuator designed to position compatible ball valves in HVAC heating and cooling systems. Operating on 24 VAC/VDC, it delivers 5 Nm of torque and responds to a 2–10 VDC control signal with a running time of 90 seconds per 90°. A separate position-feedback output allows the building automation controller to monitor valve position.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | HVAC & Building Automation |
| Part Number | LR24A-SR |
| Subcategory | Electric Valve Actuators |
| Series / Product Type | LR Series; modulating rotary actuator for compatible ball valves |
| Nominal Supply Voltage | 24 VAC/VDC |
| Supply Frequency / Voltage Range | 50/60 Hz with AC power; 19.2–28.8 VAC/VDC |
| Power Consumption | 1.5 W running; 0.4 W holding |
| Power Supply Sizing | 3 VA |
| Motor Torque | 5 Nm, approximately 44 in-lb |
| Control Input / Impedance | 2–10 VDC; 100 kΩ |
| Position Feedback / Accuracy | 2–10 VDC, maximum 1 mA; positioning accuracy ±5% |
| Motor Running Time | 90 seconds per 90° |
| Manual Override / Indication | Lockable gear-release push button; removable mechanical position indicator |
| Mounting / Travel Adjustment | Single central screw; mounting orientation in 90° increments; adjustable mechanical end stops |
| Supply / Control Cable | Approximately 3.3 ft; four conductors, each 0.75 mm² |
| Enclosure / Electrical Protection | IP54; NEMA 2; UL Enclosure Type 2; Class III SELV; UL Class 2 supply |
| Ambient Operating Conditions | −22–122°F; maximum 95% RH, non-condensing |
| Weight | Approximately 1.06 lb |
Information About LR24A-SR
The LR24A-SR is part of Belimo’s LR Series of electric rotary actuators for hydronic valve applications. Its direct-mount arrangement attaches to a compatible ball valve using one central screw, with installation orientation selectable in 90° increments. The actuator incorporates overload protection and automatically stops at the mechanical end position without requiring limit switches. A lockable gear-release button and removable mechanical position indicator support manual adjustment and commissioning.
Key Features:
- Proportional Positioning: Moves the valve to the position specified by a 2–10 VDC control signal.
- Rated Torque: Provides 5 Nm of torque for compatible HVAC ball valves.
- Dual Supply Compatibility: Operates on either 24 VAC or 24 VDC power.
- Position Feedback: Supplies a 2–10 VDC output with a maximum load of 1 mA.
- Low Holding Consumption: Requires 0.4 W while maintaining position.
- Lockable Manual Override: Disengages the gear train while the push button is pressed or locked.
- Direct Valve Mounting: Secures to the matching ball valve with a single central screw.
- Flexible Installation Orientation: Allows mounting relative to the valve in 90° increments.
- Adjustable Travel: Uses mechanical end stops to set the required rotation range.
- Overload Protection: Automatically stops at the end position without separate limit switches.
- Visual Position Indication: Provides a removable mechanical indicator for checking valve position.
The LR24A-SR delivers the reliability and precision required for proportional ball-valve positioning in commercial HVAC water systems.
Description
The Belimo LR24A-SR is a modulating rotary valve actuator designed to position compatible ball valves in HVAC heating and cooling systems. Operating on 24 VAC/VDC, it delivers 5 Nm of torque and responds to a 2–10 VDC control signal with a running time of 90 seconds per 90°. A separate position-feedback output allows the building automation controller to monitor valve position.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | HVAC & Building Automation |
| Part Number | LR24A-SR |
| Subcategory | Electric Valve Actuators |
| Series / Product Type | LR Series; modulating rotary actuator for compatible ball valves |
| Nominal Supply Voltage | 24 VAC/VDC |
| Supply Frequency / Voltage Range | 50/60 Hz with AC power; 19.2–28.8 VAC/VDC |
| Power Consumption | 1.5 W running; 0.4 W holding |
| Power Supply Sizing | 3 VA |
| Motor Torque | 5 Nm, approximately 44 in-lb |
| Control Input / Impedance | 2–10 VDC; 100 kΩ |
| Position Feedback / Accuracy | 2–10 VDC, maximum 1 mA; positioning accuracy ±5% |
| Motor Running Time | 90 seconds per 90° |
| Manual Override / Indication | Lockable gear-release push button; removable mechanical position indicator |
| Mounting / Travel Adjustment | Single central screw; mounting orientation in 90° increments; adjustable mechanical end stops |
| Supply / Control Cable | Approximately 3.3 ft; four conductors, each 0.75 mm² |
| Enclosure / Electrical Protection | IP54; NEMA 2; UL Enclosure Type 2; Class III SELV; UL Class 2 supply |
| Ambient Operating Conditions | −22–122°F; maximum 95% RH, non-condensing |
| Weight | Approximately 1.06 lb |
Information About LR24A-SR
The LR24A-SR is part of Belimo’s LR Series of electric rotary actuators for hydronic valve applications. Its direct-mount arrangement attaches to a compatible ball valve using one central screw, with installation orientation selectable in 90° increments. The actuator incorporates overload protection and automatically stops at the mechanical end position without requiring limit switches. A lockable gear-release button and removable mechanical position indicator support manual adjustment and commissioning.
Key Features:
- Proportional Positioning: Moves the valve to the position specified by a 2–10 VDC control signal.
- Rated Torque: Provides 5 Nm of torque for compatible HVAC ball valves.
- Dual Supply Compatibility: Operates on either 24 VAC or 24 VDC power.
- Position Feedback: Supplies a 2–10 VDC output with a maximum load of 1 mA.
- Low Holding Consumption: Requires 0.4 W while maintaining position.
- Lockable Manual Override: Disengages the gear train while the push button is pressed or locked.
- Direct Valve Mounting: Secures to the matching ball valve with a single central screw.
- Flexible Installation Orientation: Allows mounting relative to the valve in 90° increments.
- Adjustable Travel: Uses mechanical end stops to set the required rotation range.
- Overload Protection: Automatically stops at the end position without separate limit switches.
- Visual Position Indication: Provides a removable mechanical indicator for checking valve position.
The LR24A-SR delivers the reliability and precision required for proportional ball-valve positioning in commercial HVAC water systems.
