Honeywell VBN3AFPX6400 Valve Assembly

The Honeywell VBN3AFPX6400 Valve Assembly is a high-performance 3-way control ball valve designed for demanding HVAC applications. This 1/2 inch NPT assembly features a rugged brass body with plated brass trim, engineered to handle hot and chilled water with up to 50% glycol concentrations. Utilizing a direct coupled actuator, this unit supports modulating, floating, or two-position control signals, including 0-10Vdc, 2-10Vdc, and 4-20mA (via the included 500 ohm resistor). The valve is configured as normally open (Port B to AB), ensuring fail-safe performance in critical loops. With a 2.40 Cv rating, it provides an equal percentage flow characteristic on Port A to AB and linear flow on Port B to AB, delivering precise temperature regulation and consistent branch flow. As the VEB-4602GBDH replacement, it offers a seamless upgrade path for legacy systems requiring 24Vac power and reliable spring return safety functionality.

• Universal Control Compatibility: Seamlessly integrates into existing BMS networks with support for multiple analog and floating control signals.
• Optimized Loop Performance: The equal percentage flow characteristic ensures stable heat transfer and prevents hunting in modulating systems.
• Enhanced Durability: Constructed with a blowout-proof stem and plated brass trim to withstand static pressures up to 360 psi and temperatures up to 250°F.
• Simplified Installation: The threaded NPT connections and compact direct-coupled design eliminate the need for specialized linkages or complex mounting.
• Precision Leakage Protection: Meets ANSI Class IV standards for Port A, significantly reducing energy waste from seat leakage.

What is the fail-safe position for this assembly?
The VBN3AFPX6400 is factory-configured for the normally open position (B-AB), utilizing a mechanical spring return to ensure the valve returns to its de-energized state during power loss.

Can this valve be used for both mixing and diverting applications?
Yes, the Honeywell VBN3 series is designed for versatile piping configurations, functioning effectively in both mixing and diverting HVAC water loops.

Is this model compatible with 4-20mA control signals?
Yes, by using the 500 ohm resistor provided with the assembly, the actuator accurately processes 4-20mA signals for precise modulating control.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.