Belimo B309+TFRB24 Brass Ball Valve NPT Cv with Spring Return Actuator - 3-Way 1/2 0.8 24V

The Belimo B309+TFRB24 is a compact control valve assembly combining a 3-way brass ball valve with a 24V spring return actuator for reliable on/off control in HVAC applications. This valve features 1/2" NPT threaded connections and a flow coefficient (Cv) of 0.8, making it ideal for smaller hydronic systems requiring precise flow control.

Key Features:

• 3-way brass ball valve body with 1/2" NPT female threaded connections
• 0.8 Cv flow coefficient for accurate flow control
• 24V AC/DC spring return actuator for fail-safe positioning
• On/off (2-position) control operation
• Compact design for space-constrained installations
• Durable brass construction for long service life
• Spring return function ensures valve returns to default position on power loss

This valve assembly is commonly used in heating, cooling, and mixing applications where positive shut-off and fail-safe operation are required. The spring return actuator provides reliable positioning during power interruptions, making it suitable for critical HVAC control applications. The B309 valve body paired with the TFRB24 actuator offers a cost-effective solution for zone control, mixing loops, and changeover applications in commercial and residential systems.