Johnson Controls VG1245CNH943GGA Valve Assembly

The Johnson Controls VG1245CNH943GGA is a high-performance 1" 2-way normally closed ball valve assembly engineered for precise proportional control in demanding HVACR environments. Built with a rugged forged brass body and a 300 series stainless steel ball and stem, this assembly is designed to handle hot water, chilled water, and 50% glycol solutions. The stainless steel trim ensures compatibility with 15 psig saturated steam, providing superior corrosion resistance and longevity compared to standard plated brass options. Featuring a 11.7 Cv rating with an equal percentage flow characteristic, it delivers stable, linear control across a wide range of load conditions.

This actuated ball valve comes factory-mounted with a VA9203 series spring return actuator, providing a fail-safe "closed" position upon power loss. It supports 24VAC/VDC power and accepts versatile 0-10VDC or 4-20mA proportional signals (with the included 500-ohm resistor). The integrated thermal barrier and high-temp linkage protect the actuator from fluid temperatures reaching up to 250°F, while the NPT threaded connections and blowout-proof stem ensure a reliable, leak-free installation for commercial building automation systems.

Key Benefits

• Broad Media Compatibility: Validated for hot/chilled water and low-pressure steam up to 15 psig thanks to the industrial-grade stainless steel trim.
• Precision Modulation: The equal percentage flow insert allows for accurate temperature regulation even at low flow rates, minimizing hunting in the control loop.
• Fail-Safe Reliability: The spring return actuator ensures the valve returns to a normally closed state, protecting critical system components during power interruptions.
• Extended Service Life: Rated for a 200,000 cycle life expectancy with graphite-reinforced PTFE seats designed for minimal wear and friction.
• HVAC System Protection: A built-in thermal barrier extends the life of the electronic actuator by isolating it from high-temperature piping.

Common Questions

What is the maximum close-off pressure for this 1-inch valve?
This assembly provides a 200 psi close-off pressure rating, ensuring a tight seal and preventing leakage even in systems with high differential pressures.

Can I use a 4-20mA control signal with the VG1245CNH943GGA?
Yes. While the actuator is natively 0-10VDC proportional, it includes a 500-ohm resistor to allow for seamless integration with 4-20mA current loops from your controller.

Is this valve suitable for steam applications?
Absolutely. Because this model features stainless steel trim, it is rated for saturated steam up to 15 psig, unlike brass trim models which are restricted to water and glycol.

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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.