Belimo CQKB24-SR-LL Actuator
The Belimo CQKB24-SR-LL is a specialized electronic fail-safe actuator designed for ZoneTight zone valves, delivering precise control in hydronic systems. Operating on a 24V AC/DC power supply, it utilizes a proportional 2-10VDC or 4-20mA control signal to provide modulating performance. This model features a normally open (N/O) fail-safe position, ensuring the valve returns to its de-energized state during power loss using low-maintenance capacitor technology. Engineered for tight-close-off applications, it provides linear flow characteristics to stabilize loop pressure and improve HVAC system efficiency. The low-profile design and snap-on tool-free mounting make it ideal for restricted spaces in VAV terminals, fan coil units, and baseboard radiators. Its brushless DC motor ensures longevity and silent operation, while the IP40 rated enclosure protects internal components from debris in commercial mechanical rooms.
Key Technical Benefits
- Fail-Safe Logic: Internal capacitors provide reliable normally open positioning without the mechanical failure points of traditional springs.
- Flexible Signaling: Supports 2-10VDC modulating and 4-20mA control for seamless integration with generic BAS and DDC controllers.
- Energy Efficient: Extremely low power consumption during holding (0.5W) reduces transformer sizing requirements on large-scale chilled water projects.
- Simplified Installation: Features a manual override and status LED for rapid field commissioning and troubleshooting.
Common Questions
Can I change the fail direction of the CQKB24-SR-LL in the field?
No, this specific model is factory-set for normally open fail-safe operation. For normally closed applications, the CQC series or different logic configurations are required.
Is a separate linkage required to mount this to a Belimo CCV?
The CQ series is designed specifically for Belimo ZoneTight series valves and uses a direct-mount snap-on mechanism, eliminating the need for separate brackets or linkages.
What happens if the control signal is lost but power remains?
If the 2-10VDC signal is lost, the actuator will move to the position dictated by the signal minimum (typically closed) unless the power source itself is interrupted.
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.
Belimo CQKB24-SR-LL Actuator
The Belimo CQKB24-SR-LL is a specialized electronic fail-safe actuator designed for ZoneTight zone valves, delivering precise control in hydronic systems. Operating on a 24V AC/DC power supply, it utilizes a proportional 2-10VDC or 4-20mA control signal to provide modulating performance. This model features a normally open (N/O) fail-safe position, ensuring the valve returns to its de-energized state during power loss using low-maintenance capacitor technology. Engineered for tight-close-off applications, it provides linear flow characteristics to stabilize loop pressure and improve HVAC system efficiency. The low-profile design and snap-on tool-free mounting make it ideal for restricted spaces in VAV terminals, fan coil units, and baseboard radiators. Its brushless DC motor ensures longevity and silent operation, while the IP40 rated enclosure protects internal components from debris in commercial mechanical rooms.
Key Technical Benefits
- Fail-Safe Logic: Internal capacitors provide reliable normally open positioning without the mechanical failure points of traditional springs.
- Flexible Signaling: Supports 2-10VDC modulating and 4-20mA control for seamless integration with generic BAS and DDC controllers.
- Energy Efficient: Extremely low power consumption during holding (0.5W) reduces transformer sizing requirements on large-scale chilled water projects.
- Simplified Installation: Features a manual override and status LED for rapid field commissioning and troubleshooting.
Common Questions
Can I change the fail direction of the CQKB24-SR-LL in the field?
No, this specific model is factory-set for normally open fail-safe operation. For normally closed applications, the CQC series or different logic configurations are required.
Is a separate linkage required to mount this to a Belimo CCV?
The CQ series is designed specifically for Belimo ZoneTight series valves and uses a direct-mount snap-on mechanism, eliminating the need for separate brackets or linkages.
What happens if the control signal is lost but power remains?
If the 2-10VDC signal is lost, the actuator will move to the position dictated by the signal minimum (typically closed) unless the power source itself is interrupted.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Belimo CQKB24-SR-LL is a specialized electronic fail-safe actuator designed for ZoneTight zone valves, delivering precise control in hydronic systems. Operating on a 24V AC/DC power supply, it utilizes a proportional 2-10VDC or 4-20mA control signal to provide modulating performance. This model features a normally open (N/O) fail-safe position, ensuring the valve returns to its de-energized state during power loss using low-maintenance capacitor technology. Engineered for tight-close-off applications, it provides linear flow characteristics to stabilize loop pressure and improve HVAC system efficiency. The low-profile design and snap-on tool-free mounting make it ideal for restricted spaces in VAV terminals, fan coil units, and baseboard radiators. Its brushless DC motor ensures longevity and silent operation, while the IP40 rated enclosure protects internal components from debris in commercial mechanical rooms.
Key Technical Benefits
- Fail-Safe Logic: Internal capacitors provide reliable normally open positioning without the mechanical failure points of traditional springs.
- Flexible Signaling: Supports 2-10VDC modulating and 4-20mA control for seamless integration with generic BAS and DDC controllers.
- Energy Efficient: Extremely low power consumption during holding (0.5W) reduces transformer sizing requirements on large-scale chilled water projects.
- Simplified Installation: Features a manual override and status LED for rapid field commissioning and troubleshooting.
Common Questions
Can I change the fail direction of the CQKB24-SR-LL in the field?
No, this specific model is factory-set for normally open fail-safe operation. For normally closed applications, the CQC series or different logic configurations are required.
Is a separate linkage required to mount this to a Belimo CCV?
The CQ series is designed specifically for Belimo ZoneTight series valves and uses a direct-mount snap-on mechanism, eliminating the need for separate brackets or linkages.
What happens if the control signal is lost but power remains?
If the 2-10VDC signal is lost, the actuator will move to the position dictated by the signal minimum (typically closed) unless the power source itself is interrupted.
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.
