Johnson Controls VG1845BNH943BGA 3/4" 3-Way Ball Valve Assembly 11.7 Cv 24V Spring Return Normally Closed

The Johnson Controls VG1845BNH943BGA is a factory-assembled 3/4-inch, 3-way forged brass ball valve with an integrated spring-return electric actuator, designed for precise flow control of hot or chilled water in commercial and industrial HVAC systems. This complete valve-and-actuator assembly is part of the Johnson Controls VG1000 Series and is ready to install out of the box.

Key Features:

• Valve Size: 3/4 inch (DN20) with NPT threaded end connections
• Configuration: 3-way ball valve for mixing or diverting applications
• Flow Coefficient (Cv): 11.7 — provides high flow capacity with minimal pressure drop
• Actuator Voltage: 24V AC/DC
• Control Type: 2-position (on/off) with spring-return fail-safe action
• Fail-Safe Position: Normally closed (spring returns to port B on power loss)
• Linkage: High-temperature linkage for elevated temperature applications
• Body Material: Forged brass with stainless steel trim
• Maximum Temperature: 250°F (121°C)
• Maximum Pressure: 300 PSI (20.7 bar)
• Auxiliary Switch: Not included

The spring-return actuator provides reliable fail-safe operation, automatically returning the valve to its normally closed position upon loss of power — a critical safety feature in hydronic heating and cooling circuits. The 24V power supply makes this assembly compatible with the vast majority of building automation and DDC control systems.

Ideal for use in air handling units, fan coil units, heat exchangers, and terminal unit applications where dependable 3-way flow switching and tight shutoff are required. The factory-mounted actuator eliminates field assembly time and ensures proper alignment and calibration.