Johnson Controls VG1845ANH943BGA 1/2" 3-Way Ball Valve Assembly 11.7 Cv Spring Return NC 24VAC On/Off

The Johnson Controls VG1845ANH943BGA is a factory-assembled 1/2-inch three-way ball valve and spring-return electric actuator assembly engineered for precise flow control of hot water, chilled water, and glycol solutions in commercial HVAC systems. With a flow coefficient (Cv) of 11.7, this assembly delivers reliable on/off two-position control at 24 VAC.

The VG1845AN valve body features a forged brass body with stainless steel trim, including a stainless steel ball and blowout-proof stem, EPDM O-ring stem seals, and graphite-reinforced PTFE seats for long-lasting, leak-free performance. The high-temperature stainless trim designation (H) extends the fluid temperature range to -22°F to 212°F (-30°C to 100°C), making it suitable for demanding hydronic applications. This three-way configuration provides mixing or diverting flow patterns with equal percentage flow characteristic on Port A (coil) and linear on Port B (bypass).

The integrated 943BGA spring-return actuator is factory-mounted and operates on 24 VAC with two-position (on/off) control. The spring-return mechanism drives the valve to the normally closed (NC) fail-safe position on loss of power, with spring return clockwise closing Port A. The actuator includes one auxiliary switch for end-of-travel feedback or interlock wiring.

Key Features:

• Valve Size: 1/2 in. NPT female end connections
• Flow Coefficient: Cv = 11.7
• Configuration: 3-way mixing/diverting ball valve
• Trim Material: Stainless steel ball and stem (high-temperature rating)
• Body Material: Forged brass
• Seat Material: Graphite-reinforced PTFE with EPDM O-ring backing
• Fluid Temperature Range: -22°F to 212°F (-30°C to 100°C)
• Close-Off Pressure: 200 psig (3-way)
• Actuator Type: Spring-return electric (VA9203 series)
• Control Voltage: 24 VAC
• Control Signal: 2-position on/off
• Fail-Safe Position: Normally closed (spring return clockwise — Port A closed)
• Auxiliary Switch: One switch included
• Enclosure Rating: NEMA 2, IP54
• Leakage Rating: ANSI/FCI 70-2, Class IV (0.01% of Cv)
• Media Compatibility: Hot water, chilled water, up to 50% glycol solution

The VG1845ANH943BGA is part of the Johnson Controls VG1000 Series, designed for direct integration with building automation and HVAC control systems. The factory-assembled and tested combination ensures proper actuator-to-valve alignment for reliable long-term operation.