Johnson Controls VG7842ST Valve

The Johnson Controls VG7842ST Valve is a 2-inch NPT 3-way mixing globe valve engineered for precision control in commercial HVACR hydronic systems. Featuring a rugged cast bronze body and brass trim, this VG7000 series valve is designed for high-performance fluid regulation with a 46.2 Cv flow coefficient. The linear flow characteristic ensures stable modulation whether handling hot water, chilled water, or 50% glycol solutions. Built with a standard threaded stem, the VG7842ST offers seamless actuator compatibility with Johnson Controls pneumatic and electric actuators. This mixing valve is a reliable choice for technical replacements where maintaining accurate discharge temperatures is critical. With a maximum fluid temperature rating of 281°F, this valve handles demanding hydronic system control requirements while providing a tight shut-off to prevent bypass leakage and energy loss. Rely on this NPT globe valve for long-term durability in heavy-duty mechanical rooms.

• Optimized Flow Control: High 46.2 Cv rating supports significant flow rates while maintaining linear modulation accuracy.
• Durable Construction: The cast bronze body and brass internal trim resist corrosion and wear in aggressive water loop environments.
• Flexible Integration: Standard NPT threaded connections and 2-inch sizing simplify drop-in replacement during system retrofits.
• High Temperature Resilience: Capable of managing fluid temperatures up to 281°F (138°C) for diverse heating and cooling applications.
• Actuator Versatility: Compatible with a wide range of spring-return and non-spring-return actuators for tailored sequence of operations.

Is the VG7842ST suitable for steam applications?
This specific model is primarily designed for water and glycol mixtures; for high-pressure steam, verify the packing material compatibility with the manufacturer’s technical data sheets.

What type of maintenance is required for the valve stem?
The standard threaded stem is designed for minimal maintenance, though regular inspection of the packing nut is recommended to ensure no leaks develop under high-cycling conditions.

Can this valve be used for diverting service instead of mixing?
The VG7842ST is specifically ported for 3-way mixing. Using a mixing valve in a diverting application can lead to premature seat wear and hydraulic noise; always match the valve body porting to the intended flow direction.

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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.