Belimo LRB120-SR Actuator
The Belimo LRB120-SR is a high-performance fail-safe proportional actuator designed for the precise control of ball valves in HVACR systems. Operating on a universal 100 to 240 VAC power supply, this non-spring return actuator delivers a consistent torque of 45 in-lb (5 Nm), ensuring reliable modulation for B2 and B3 series pressure compensated valves. It utilizes a standard 2 to 10 VDC control signal or 4 to 20 mA with an external 500 ? resistor, providing accurate 0 to 100% stroke positioning. Built with a NEMA 2 / IP54 housing, the LRB120-SR is engineered for demanding mechanical room environments. The unit features manual override via a push-button and a brushless DC motor for maintenance-free operation. Technical specifications include a 150-second constant run time and a Class 2 power supply requirement, making it a reliable choice for field retrofits or new damper and valve control installations where high-voltage versatile input is required.
- Universal Voltage Input: Operates seamlessly between 100 and 240 VAC, reducing the need for multiple SKUs and transformers.
- Precise Modulation: Proportional control via 2-10 VDC signal allows for exact flow regulation and improved system efficiency.
- Field Reliability: Brushless DC motor technology prevents stall damage and ensures consistent torque output over the life of the device.
- Easy Installation: Features a simple manual override and a universal spindle clamp compatible with various valve stems.
How do I wire the Belimo LRB120-SR for a 4-20 mA control signal?
To utilize a 4-20 mA signal with this actuator, you must install a 500 ? resistor in parallel across the input signal leads to convert the current into a 2-10 VDC voltage range.
Can this actuator be used in outdoor applications?
The unit is rated NEMA 2/IP54, which protects against light moisture and dust; however, for full outdoor exposure, a protective weather shield or enclosure is recommended to prevent environmental degradation.
What happens if the power fails on a non-spring return actuator like the LRB120-SR?
As a non-spring return model, the actuator will maintain its last position upon loss of power unless manually adjusted using the override button.
This item does not qualify for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $263.59
-65%$263.59
$92.26Belimo LRB120-SR Actuator
The Belimo LRB120-SR is a high-performance fail-safe proportional actuator designed for the precise control of ball valves in HVACR systems. Operating on a universal 100 to 240 VAC power supply, this non-spring return actuator delivers a consistent torque of 45 in-lb (5 Nm), ensuring reliable modulation for B2 and B3 series pressure compensated valves. It utilizes a standard 2 to 10 VDC control signal or 4 to 20 mA with an external 500 ? resistor, providing accurate 0 to 100% stroke positioning. Built with a NEMA 2 / IP54 housing, the LRB120-SR is engineered for demanding mechanical room environments. The unit features manual override via a push-button and a brushless DC motor for maintenance-free operation. Technical specifications include a 150-second constant run time and a Class 2 power supply requirement, making it a reliable choice for field retrofits or new damper and valve control installations where high-voltage versatile input is required.
- Universal Voltage Input: Operates seamlessly between 100 and 240 VAC, reducing the need for multiple SKUs and transformers.
- Precise Modulation: Proportional control via 2-10 VDC signal allows for exact flow regulation and improved system efficiency.
- Field Reliability: Brushless DC motor technology prevents stall damage and ensures consistent torque output over the life of the device.
- Easy Installation: Features a simple manual override and a universal spindle clamp compatible with various valve stems.
How do I wire the Belimo LRB120-SR for a 4-20 mA control signal?
To utilize a 4-20 mA signal with this actuator, you must install a 500 ? resistor in parallel across the input signal leads to convert the current into a 2-10 VDC voltage range.
Can this actuator be used in outdoor applications?
The unit is rated NEMA 2/IP54, which protects against light moisture and dust; however, for full outdoor exposure, a protective weather shield or enclosure is recommended to prevent environmental degradation.
What happens if the power fails on a non-spring return actuator like the LRB120-SR?
As a non-spring return model, the actuator will maintain its last position upon loss of power unless manually adjusted using the override button.
This item does not qualify for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Belimo LRB120-SR is a high-performance fail-safe proportional actuator designed for the precise control of ball valves in HVACR systems. Operating on a universal 100 to 240 VAC power supply, this non-spring return actuator delivers a consistent torque of 45 in-lb (5 Nm), ensuring reliable modulation for B2 and B3 series pressure compensated valves. It utilizes a standard 2 to 10 VDC control signal or 4 to 20 mA with an external 500 ? resistor, providing accurate 0 to 100% stroke positioning. Built with a NEMA 2 / IP54 housing, the LRB120-SR is engineered for demanding mechanical room environments. The unit features manual override via a push-button and a brushless DC motor for maintenance-free operation. Technical specifications include a 150-second constant run time and a Class 2 power supply requirement, making it a reliable choice for field retrofits or new damper and valve control installations where high-voltage versatile input is required.
- Universal Voltage Input: Operates seamlessly between 100 and 240 VAC, reducing the need for multiple SKUs and transformers.
- Precise Modulation: Proportional control via 2-10 VDC signal allows for exact flow regulation and improved system efficiency.
- Field Reliability: Brushless DC motor technology prevents stall damage and ensures consistent torque output over the life of the device.
- Easy Installation: Features a simple manual override and a universal spindle clamp compatible with various valve stems.
How do I wire the Belimo LRB120-SR for a 4-20 mA control signal?
To utilize a 4-20 mA signal with this actuator, you must install a 500 ? resistor in parallel across the input signal leads to convert the current into a 2-10 VDC voltage range.
Can this actuator be used in outdoor applications?
The unit is rated NEMA 2/IP54, which protects against light moisture and dust; however, for full outdoor exposure, a protective weather shield or enclosure is recommended to prevent environmental degradation.
What happens if the power fails on a non-spring return actuator like the LRB120-SR?
As a non-spring return model, the actuator will maintain its last position upon loss of power unless manually adjusted using the override button.
This item does not qualify for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
