Belimo CQB24-SR-R Actuator

The Belimo CQB24-SR-R Actuator is a space-saving, high-performance solution designed for seamless integration with ZoneTight zone valves. This non-spring return actuator operates on a 24V AC/DC power supply and supports a 2-10VDC modulating control signal (4-20mA compatible with a 500 ? resistor), providing precise proportional control for 1/2" to 1" valves. Engineered for efficiency, it features a low power consumption of only 0.3W while running, significantly reducing energy costs compared to traditional models. The normally closed configuration ensures reliable operation, while the compact 4.33-inch installation height is ideal for tight mechanical spaces. This NSR valve actuator mounts directly without additional linkage, utilizing a 3ft plenum cable for simplified wiring. For contractors, the Belimo CQB24-SR-R delivers 75-second motor timing and consistent 90-degree rotation, ensuring optimal flow regulation in chilled or hot water systems.

• Efficient Proportional Control: Specifically designed for 2-10VDC modulating signals to ensure accurate valve positioning and flow management.
• Ultra-Low Power Consumption: Consumes only 0.3W during operation, offering major energy savings for larger multi-zone installations.
• Tools-Free Installation: Features a snap-fit design that allows for direct mounting to the valve body without complex linkage or specialized tools.
• Compact Footprint: The low-profile design fits easily into cramped enclosures and plenum spaces where standard actuators cannot.
• System Versatility: Compatible with 24V AC/DC and adjustable for 4-20mA signals, making it a flexible choice for diverse HVAC control systems.

Is the Belimo CQB24-SR-R compatible with 4-20mA signals?
Yes, while the native input is 2-10VDC, this unit can process a 4-20mA control signal by adding a ZG-R01 500 Ohm resistor to the circuit.

How do I confirm the fail-safe position for this model?
The CQB24-SR-R is a non-spring return (NSR) actuator. It maintains its last position upon loss of power rather than returning to a pre-defined fail position. The “R” designation indicates it is configured for normally closed operation during standard powered control.

Can these actuators be wired in parallel?
Yes, multiple CQB24-SR-R actuators can be connected in parallel, provided the transformer sizing (1 VA per actuator) and total input impedance are correctly accounted for by the technician.

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.