Belimo B313B+LF120-S Brass Ball Valve with On/Off Actuator - 1/2 3-Way 120V

The Belimo B313B+LF120-S is a compact 3-way brass ball valve assembly designed for precise control in HVAC applications. This valve features a 1/2" NPT connection and delivers a flow coefficient (Cv) of 4.7, making it ideal for small to medium-sized hydronic systems requiring reliable mixing or diverting control.

Key Features:

• 1/2" NPT threaded connections for easy installation in tight spaces
• Lead-free brass construction compliant with drinking water regulations
• LF120-S spring return actuator with 120V power supply for fail-safe operation
• On/Off (2-position) control for simple switching applications
• 4.7 Cv rating provides efficient flow control in hydronic systems
• Auxiliary switch (SW) included for status indication or interlock functions
• Spring return ensures valve returns to default position on power loss
• Compact actuator design minimizes installation footprint

This factory-assembled valve and actuator combination arrives ready to install, eliminating the need for field assembly and ensuring proper actuator-to-valve matching. The spring return mechanism provides predictable fail-safe positioning, making it suitable for critical HVAC applications where system safety is paramount. The included auxiliary switch enables integration with building automation systems for monitoring and control.