Johnson Controls VG7842RT Valve

The Johnson Controls VG7842RT is a high-performance 3-way mixing globe valve designed for precise fluid control in commercial HVAC systems. This VG7000 Series valve features a 1-1/2 inch NPT threaded connection and is engineered with a rugged cast bronze body and brass trim to handle demanding hydronic and steam applications. With a 28.9 Cv flow coefficient and a linear flow characteristic, it ensures stable proportional control for hot water, chilled water, and 50/50 glycol solutions. Rated for ANSI Class 250 service, the VG7842RT supports a maximum static pressure of 400 psi and can manage saturated steam up to 35 psig. The standard threaded stem allows for seamless integration with a wide variety of Johnson Controls pneumatic and electric actuators, making it a reliable choice for field-assembled control valve requirements. Technicians value this unit for its serviceable packing and tight shutoff capabilities, maintaining system efficiency in complex mixing loops.

• Precision Mixing: Engineered with a linear flow characteristic and a high 28.9 Cv for accurate temperature regulation in large-scale air handling units.
• Industrial Durability: The cast bronze construction and brass trim provide excellent corrosion resistance and longevity under continuous thermal cycling.
• High-Pressure Compliance: Fully compliant with ANSI Class 250 standards, suitable for systems with static pressures up to 400 psi.
• Actuator Versatility: Features a standard threaded stem compatible with diverse VA7800 series electric or V-3000 series pneumatic actuators.
• Wide Temperature Range: Rated for fluid temperatures ranging from 35°F to 284°F, accommodating everything from chilled water to low-pressure steam.

What is the maximum close-off pressure for this valve?
Close-off pressure is dependent on the specific actuator paired with the VG7842RT valve body. Consult the VG7000 Series selection guide for exact ratings based on your pneumatic or electric actuator choice.

Can this valve be used for diverting applications?
No, the VG7842RT is specifically designed as a 3-way mixing valve. It should not be used in a diverting configuration as it may lead to unstable flow and premature seat wear.

Is the packing replaceable in the field?
Yes, the Johnson Controls VG7000 series is designed for serviceability, allowing technicians to repack the stem in-place to extend the service life of the valve assembly.

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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.