Belimo B209B+LF24 NPT Brass Ball Valve Cv Spring Return Actuator - 1/2 0.8 24V 2-Position

The Belimo B209B+LF24 is a compact 2-position spring return ball valve assembly designed for on/off control applications in HVAC systems. This valve combines a 1/2" NPT threaded brass ball valve with a 24V AC/DC electric actuator for reliable zone control and hydronic system isolation.

Key Specifications:

• Valve size: 1/2" NPT threaded connections
• Valve body: Brass construction for durability and corrosion resistance
• Flow coefficient (Cv): 0.8 for proper flow control
• Actuator voltage: 24V AC/DC universal power supply
• Control type: Spring return (S/R) for fail-safe positioning
• Positioning: 2-position control (open/closed)
• Actuator torque: 35 in-lbs for positive seating
• Run time: Approximately 30 seconds (90° rotation)

Features and Benefits:

• Spring return actuator provides fail-safe operation, automatically returning to the closed position on power loss
• Lead-free brass construction meets current plumbing codes
• Compact design allows installation in tight mechanical spaces
• Manual override lever for manual operation during maintenance
• Visual position indicator for easy status verification
• UL and CSA certified for commercial HVAC applications

Ideal for zone control valves, heating and cooling coil isolation, and general on/off hydronic control applications in commercial and residential HVAC systems. The spring return function ensures the valve returns to a safe closed position during power interruptions, making it suitable for safety-critical applications.