Belimo B309B+TFRB24 3-Way Bronze Control Valve 1/2" NPT 0.8 Cv 24V On/Off Actuator

The Belimo B309B+TFRB24 is a compact 3-way characterized control valve (CCV) assembly designed for hydronic HVAC systems requiring precise flow control. This complete valve-actuator package combines a 1/2" NPT bronze valve body with a 24-volt spring return actuator for reliable on/off control applications.

Key Specifications:

• Valve flow coefficient (Cv) of 0.8 for accurate flow modulation
• Bronze body construction with 1/2" NPT threaded connections
• 3-way valve configuration for mixing or diverting applications
• 24V AC/DC spring return actuator with 2-position control
• Fail-safe spring return operation ensures safe positioning on power loss
• Direct-mount actuator design for compact installation

This valve assembly is ideal for small zone control, unit ventilator applications, and other HVAC systems where space is limited and reliable failsafe operation is critical. The spring return actuator automatically returns the valve to its normal position when power is removed, providing safety and energy efficiency in heating and cooling distribution systems.