Belimo B221B+LF120-S NPT Control Valve Cv Spring Return Actuator - 3/4 2-Way 24 120V

The Belimo B221B+LF120-S is a complete control valve assembly combining a 3/4" NPT threaded brass ball valve with an integrated 120V spring return electric actuator. This 2-way valve features a 24 Cv flow coefficient, making it suitable for medium-flow HVAC applications including heating, cooling, and domestic hot water systems.

Key Features:

• 3/4" NPT female threaded connections for easy installation
• 24 Cv flow coefficient for medium flow capacity
• 120V on/off control with spring return fail-safe positioning
• 2-way valve design for shut-off or diverting applications
• Durable brass valve body with chrome-plated brass ball
• Compact actuator design with auxiliary switch for status indication
• Spring return ensures valve returns to safe position on power failure
• Factory assembled and tested for reliable operation

This actuated valve assembly is ideal for commercial HVAC systems requiring reliable, fail-safe control of water or glycol solutions. The spring return mechanism provides automatic valve positioning during power outages, while the auxiliary switch allows for remote monitoring of valve position. UL and cUL listed for North American installations.