Johnson Controls VG1845AN+943BGB 1/2" 3-Way Ball Valve Assembly 11.7 Cv Spring Return 24V 2-Position Normally Closed

The Johnson Controls VG1845AN+943BGB is a factory-assembled 3-way forged brass ball valve paired with a spring return electric actuator, engineered for precise flow control in commercial HVAC hydronic systems. This ready-to-install assembly combines the VG1845AN 1/2" three-way valve body (11.7 Cv) with the 943BGB two-position, spring return actuator operating at 24 VAC/VDC.

Key Features:

• 3-Way Configuration: Suitable for mixing or diverting service in hot water, chilled water, and up to 50% glycol solutions
• 11.7 Cv Flow Coefficient: Full-port design on a 1/2" NPT connection with no reduction in flow capacity
• Forged Brass Body: Rated to 580 psig static pressure with a maximum close-off pressure of 200 psid
• Stainless Steel Ball & Blowout-Proof Stem: Corrosion-resistant trim for long service life in demanding HVAC applications
• Graphite-Reinforced PTFE Seats: 15% graphite-reinforced ball seals provide superior wear resistance compared to virgin PTFE, tested for 200,000 leak-free cycles
• EPDM Double O-Ring Stem Seal: Ensures leak-free operation in iron-oxide contaminated water throughout the valve's service life
• 500:1 Rangeability: Delivers accurate flow control across all load conditions
• Spring Return Fail-Safe (Normally Closed): Actuator returns valve to the closed position on power loss for inherent system safety
• 2-Position (On/Off) Control: 24 VAC/VDC input for simple open/close operation from building automation systems or thermostats
• ANSI Class IV Leakage Rating: 0.01% of maximum Cv for tight shutoff performance
• NEMA 2 / IP54 Enclosure: Protects actuator electronics from dripping water and dust ingress
• Direct-Mount Actuator: Factory-assembled for quick installation with no additional linkage required

The VG1845AN+943BGB is part of Johnson Controls' VG1000 Series, a widely specified product family for HVAC hydronic coil control. The assembly is compatible with BACnet, LON, and conventional DDC systems via standard 24V on/off wiring. Operating temperature range for the fluid is 23°F to 203°F (-5°C to 95°C), making it suitable for both heating and cooling coil applications.