Belimo B311B+LRB24-3 1/2" 3-Way Characterized Control Valve with Actuator

The Belimo B311B+LRB24-3 is a complete valve and actuator assembly designed for precise control of water or glycol solutions in HVAC systems. This package combines a 1/2" brass 3-way characterized control valve with an LRB24-3 spring return actuator for reliable on/off or floating control applications.

Key Specifications:

• Valve size: 1/2" NPT threaded connections
• Configuration: 3-way mixing or diverting valve
• Flow coefficient (Cv): 1.9
• Actuator voltage: 24V AC/DC
• Control type: On/off with spring return and auxiliary switches
• Characterized control for linear flow response
• Fail position: Spring return to normal position on power loss
• Auxiliary contacts for status feedback

Applications:

• Hydronic heating and cooling systems
• Chilled water and hot water distribution
• Fan coil units and unit ventilators
• Small zone control applications

The LRB24-3 actuator provides 35 in-lb torque with a spring return mechanism that automatically returns the valve to its normal position during power failure, making this assembly ideal for safety-critical applications. The characterized valve design ensures linear control characteristics for improved system performance and energy efficiency.