Description
The Belimo CQKB24-SR-LL is a 24V modulating valve actuator engineered for precise flow control in commercial HVAC hydronic systems. Designed to accept both 2–10VDC and 4–20mA modulating control signals, this actuator provides flexible integration with a wide range of building automation and direct digital control (DDC) systems. The normally open (N/O) fail-safe configuration ensures the valve returns to the open position upon loss of power, making it a reliable choice for applications where flow continuity is critical during power interruptions.
Key Features
- 24V AC/DC supply voltage for broad compatibility with standard HVAC control circuits
- Modulating control via 2–10VDC or 4–20mA input signal for accurate, proportional positioning
- Normally open (N/O) fail-safe operation — returns to open position on power loss
- Spring-return mechanism provides reliable fail-safe actuation without auxiliary power
- Compact, low-profile design suitable for tight mechanical room installations
- Manual override for commissioning and maintenance convenience
- Designed for compatibility with Belimo CQK series characterized control valves
- Suitable for 2-way and 3-way valve applications in heating and cooling systems
Typical Applications
- Commercial hydronic heating and cooling coil control
- Fan coil unit (FCU) valve actuation
- Air handling unit (AHU) heating and cooling coil valves
- Building automation system (BAS) and DDC-integrated valve control
- Variable flow hydronic distribution systems
Why Choose Belimo
Belimo is a globally recognized leader in actuator and valve technology for HVAC applications. The CQKB24-SR-LL reflects Belimo’s commitment to energy efficiency, installation simplicity, and long-term reliability. The integrated spring-return mechanism and dual-signal input capability reduce installation complexity while ensuring system uptime and precise zone control in demanding commercial environments.
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