Johnson Controls VG7241ST+72CHGA Valve Assembly

The Johnson Controls VG7241ST+72CHGA is a heavy-duty 2-inch NPT globe valve assembly engineered for precise modulation of hot water, chilled water, and 38 psig saturated steam in commercial HVAC systems. This 2-way normally open valve features a robust cast bronze body and a 46.2 Cv equal percentage flow characteristic, ensuring stable control even through varying pressure drops. As the direct replacement for the VG7241ST+926AGA, this unit utilizes the VA7820-HGA-2 series spring-return electric actuator, offering field-selectable control for 0(2)-10 VDC, 0(4)-20 mA, floating, or two-position signals. The brass trim and high-temperature packing are rated for fluid temperatures up to 284°F, providing long-term reliability for demanding hydronic mechanical rooms. Contractors can rely on the integrated synchronous motor and magnetic clutch for consistent seating force and positive shut-off, maintaining ANSI Class IV leakage standards across the 3/4-inch valve stroke.

• Universal Control Compatibility: The VA7820 actuator supports multiple input signals, including 0-10 VDC and 4-20 mA, for seamless integration with legacy and modern building automation systems.
• High-Capacity Flow: A 46.2 Cv rating combined with an equal percentage characteristic allows for accurate heat transfer control in large-scale air handling units and heat exchangers.
• Fail-Safe Security: The spring return mechanism ensures the valve returns to the normally open position during a power loss, protecting critical coils from freezing or overheating.
• Direct Replacement Logic: Specifically designed to replace the VG7241ST+926AGA, simplifying retrofits with the same 2" NPT footprint and 24VAC power requirements.

Is this valve assembly compatible with steam?
Yes, the VG7241ST+72CHGA is rated for saturated steam up to 38 psig. For steam applications, ensure the actuator is installed in a horizontal position to prevent heat damage from the pipe.

Can I change the control signal in the field?
Yes. The proportional actuator features internal DIP switches or jumpers that allow you to select between 0-10 VDC, 4-20 mA, or 3-wire floating control without needing additional parts.

What is the maximum fluid temperature for the brass trim?
This Johnson Controls VG7000 series assembly handles water and glycol solutions ranging from 35°F to 284°F, covering most high-temp heating and chilled water specs.

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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.