Honeywell V8943B1010 Valve

The Honeywell V8943B1010 is a commercial-grade single stage pressure regulating gas valve designed for high-demand atmospheric boilers, commercial water heaters, and rooftop units. This 24Vac slow opening gas valve provides precise fuel control for natural gas systems, featuring a factory-set outlet pressure of 3.5" WC with an adjustable high fire range between 3.0" and 4.5" WC. Built with a rugged aluminum body and a straight-through non-offset pattern, it supports a high-volume capacity of 300 to 1000 CFH. As a solenoid-operated diaphragm valve, the V8943B1010 ensures a controlled 3 to 25-second opening time to prevent flame roll-out and hard starts, while maintaining a 2-second maximum closing time for immediate safety shutoff. This unit serves as a direct replacement for Honeywell V4843 and V8843 series valves, utilizing 1" NPT inlet/outlet connections, a 1/8" NPT pilot tapping, and a 5/16" UNF bleed tapping for seamless integration into existing manifolds.

Key Benefits for Contractors

• Enhanced Safety: Combines reliable safety shutoff and pressure regulation in a single compact footprint.
• Flexible Mounting: Approved for both upright and horizontal installation to accommodate tight mechanical room clearances.
• Extreme Weather Resilience: Rated for ambient temperatures ranging from -40°F to 150°F (-40°C to 66°C).
• Simplified Wiring: Includes two 30-inch lead wires for fast connection to 24V controllers and thermostats.
• Consistent Performance: 1/2 PSI pressure rating ensures stable burner operation in varying inlet conditions.

Common Questions

Is the V8943B1010 compatible with LP gas?
No, this specific model is engineered strictly for natural gas applications. Converting this valve for use with liquid propane is not recommended.

What is the difference between the V8943B1010 and V8943B1010/U?
There is no functional difference; the /U suffix simply designates "Universal" packaging for the wholesale channel. Both units share identical technical specifications.

Can this valve be mounted upside down?
The manufacturer specifies upright or horizontal mounting. Mounting the valve in an inverted position can interfere with the diaphragm operation and internal regulator spring tension.

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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.