Belimo B312B+LF120-S NPT Brass Ball Valve with Spring Return Actuator - 1/2 3-Way 120V

The Belimo B312B+LF120-S is a complete valve and actuator assembly featuring a 1/2" NPT threaded 3-way brass ball valve paired with a 120V on/off spring return actuator. This compact control valve assembly is designed for HVAC applications requiring reliable two-position control of water, glycol solutions, or other compatible fluids.

Key Specifications:

• Valve size: 1/2" NPT threaded connections
• Configuration: 3-way brass ball valve with mixing or diverting capability
• Flow coefficient (Cv): 3.0
• Actuator voltage: 120V AC
• Control type: On/Off (2-position)
• Spring return functionality for fail-safe positioning
• Auxiliary switch included for status indication
• Lead-free construction compliant with drinking water standards

Features & Benefits:

• Factory-assembled and tested valve/actuator combination for quick installation
• Spring return mechanism ensures valve returns to safe position upon power loss
• Compact design suitable for installations with limited space
• Durable brass construction for long service life
• Auxiliary switch provides valve position feedback to building automation systems
• Lead-free compliance for potable water applications

Ideal for fan coil units, unit heaters, small air handling units, and other HVAC applications requiring simple two-position control. The spring return feature makes this assembly particularly suitable for applications requiring a defined fail-safe position during power outages or system shutdowns.