Belimo B219B+LF24-SR-S NPT Control Valve with Proportional Actuator - 3/4 2-Way

The Belimo B219B+LF24-SR-S is a complete control valve assembly combining a B219B brass ball valve with an LF24-SR-S proportional actuator. This 3/4" NPT threaded, 2-way valve features a 10 Cv flow coefficient, making it ideal for hydronic HVAC systems requiring precise modulating control.

Key Features:

• 3/4" NPT threaded connections for easy installation
• 10 Cv flow coefficient for medium flow applications
• 24V AC/DC spring return actuator with fail-safe operation
• 2-10 VDC proportional control signal for modulating control
• Manual override switch (SW) for service and commissioning
• Brass ball valve construction with stainless steel ball and stem
• Compact design with direct mount actuator
• Spring return ensures valve closes on power failure

This assembly is designed for chilled water, hot water, and glycol solutions in commercial HVAC applications. The proportional control allows for precise flow modulation, while the spring return feature provides reliable fail-safe positioning. The integral auxiliary switch enables system integration and status monitoring.