Description
The Belimo Z2050Q-J+CQKB24-LL is a factory-matched combination of a 1/2″ two-way zone valve body and a CQKB24-LL fail-safe actuator, engineered for precise hydronic flow control in commercial and residential HVAC applications. Belimo’s Z-series valves are renowned for their tight shut-off performance, long service life, and easy field installation, making this combo assembly a trusted choice for hydronic heating and cooling systems, fan coil units, and terminal unit applications.
The CQKB24-LL actuator delivers reliable fail-safe operation, automatically returning the valve to its closed (or open) position upon loss of power — a critical safety feature for protecting equipment and maintaining system integrity. Operating on 24V AC/DC, it integrates seamlessly with standard building automation and zone control systems.
Key Features
- 1/2″ two-way (2W) valve body — ideal for hydronic heating and cooling terminal units
- 5.9 Cv flow coefficient for accurate, balanced flow control
- Fail-safe actuator (CQKB24-LL) — spring-return to safe position on power loss
- 24V AC/DC operating voltage for broad compatibility with BAS and zone control panels
- Factory-matched valve and actuator combo for simplified ordering and installation
- Compact design suitable for tight mechanical spaces
- Belimo’s proven Z-series construction for long-term, low-maintenance performance
- Suitable for fan coil units, air handling units, and hydronic zone control applications
Specifications
- SKU: Z2050Q-J+CQKB24-LL
- Brand: Belimo
- Valve Size: 1/2″
- Valve Configuration: 2-Way
- Flow Coefficient (Cv): 5.9
- Actuator Model: CQKB24-LL
- Actuator Type: Fail-Safe (Spring Return)
- Operating Voltage: 24V AC/DC
Applications
- Hydronic heating and cooling systems
- Fan coil unit (FCU) flow control
- Air handling unit (AHU) coil control
- Commercial and residential HVAC zoning
- Building automation system (BAS) integration
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