Johnson Controls VG2231VM294NGGA Valve Assembly

The Johnson Controls VG2231VM294NGGA is a heavy-duty 4-inch 2-way normally closed globe valve designed for precise flow control in demanding hydronic systems. Featuring an ANSI Class 125 flat-faced flange and a rugged cast iron body with brass trim, this assembly handles high-capacity applications requiring a 150 Cv rating. The modified linear flow characteristic ensures stable modulation, while the 3/8-inch threaded stem provides reliable mechanical linkage. Driven by a tandem mount spring return actuator, the unit supports 24Vac/Vdc power and accepts multiple control signals, including 0-10Vdc, 2-10Vdc, and 4-20mA via the integrated 500-ohm resistor. This configuration is essential for commercial HVAC chilled water systems and hot water loops where fail-safe performance is mandatory. The spring return globe valve assembly ensures the valve returns to the closed position during power loss, protecting critical infrastructure from uncontrolled flow.

• Fail-Safe Reliability: The tandem mount actuator provides high close-off pressure and a spring return fail-safe mechanism for system protection.
• Flexible Control Logic: Field-selectable proportional control signals (0-10Vdc or 4-20mA) allow for seamless integration with BAS and Metasys controllers.
• Industrial Build Quality: The cast iron body and ANSI 125 flange construction are engineered for durability in large-scale piping networks.
• Precision Metering: A modified linear flow characteristic provides accurate throttling, reducing hunting in constant and variable volume systems.

What is the close-off pressure rating for this 4-inch valve?
This Johnson Controls VG2000 series assembly is designed to provide high close-off force using tandem actuators, though specific PSI limits depend on the internal trim and media temperature.

Can this valve be used for steam applications?
The VG2231VM294NGGA features brass trim and is primary designed for water and glycol solutions; always verify medium compatibility with the packing material before installation in steam lines.

Does this unit come pre-assembled?
Yes, this flanged globe valve is delivered as a complete factory-calibrated assembly including the linkage and tandem actuators for immediate field installation.

This item must ship via trucking. Please contact us for freight quote.

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.