Belimo B221B+LRB24-SR Control Valve Cv with Non-Spring Return Actuator - 3/4 2-Way 24

The Belimo B221B+LRB24-SR is a complete control valve assembly combining a 3/4" NPT brass ball valve with an electronic proportional control actuator. This 2-way control valve features a 24 Cv flow coefficient, making it suitable for medium-flow HVAC applications requiring precise modulating control.

Key Specifications:

• Valve size: 3/4" NPT threaded connections
• Flow coefficient (Cv): 24
• Valve body material: Brass construction for durability and corrosion resistance
• Configuration: 2-way ball valve design
• Actuator type: LRB24-SR non-spring return (NSR) electronic actuator
• Power supply: 24V AC/DC
• Control signal: 2-10 VDC proportional modulating control
• Non-spring return design maintains position on power loss

Features and Benefits:

• Proportional 2-10 VDC control for precise flow modulation
• Non-spring return actuator holds valve position during power failure
• Factory-assembled and tested for immediate installation
• Compact design suitable for tight mechanical spaces
• Reliable Belimo actuator technology with long service life

This valve assembly is ideal for chilled water, hot water, and hydronic heating/cooling systems where proportional control is required. The non-spring return actuator is well-suited for applications where maintaining the last position during power outages is preferred over automatic fail-safe positioning.