Johnson Controls VG7241NT+822D01 Valve Assembly

The Johnson Controls VG7241NT+822D01 is a robust 1-inch pneumatic valve assembly designed for precise flow control in commercial HVAC systems. This 2-way normally open valve features a high-grade cast bronze body and brass trim, ensuring durability in demanding hydronic applications. With an 11.6 Cv rating and equal percentage flow characteristic, it provides stable modulation for chilled or hot water systems. The assembly is driven by an 822D01 pneumatic actuator featuring a 4-8 PSI spring range and an integrated valve positioner for superior accuracy in pressure-to-stroke correlation. Its spring-return failsafe ensures the valve retreats to the open position upon loss of control signal, maintaining system safety. Designed for NPT threaded connections, this VG7000 series assembly simplifies installation and maintenance for field technicians requiring reliable HVAC valve replacement parts that meet strict performance tolerances.

Key Benefits

• Precise Flow Control: The equal percentage flow characteristic ensures consistent temperature control across varyied load conditions.
• Failsafe Operation: Spring return mechanism guarantees a normally open state during pneumatic supply interruptions.
• Durable Construction: Cast bronze body and brass trim offer high resistance to corrosion and mechanical wear.
• Enhanced Accuracy: The integrated pneumatic positioner minimizes hysteresis and ensures the 4-8 PSI signal maps accurately to valve travel.
• Standardized Fitment: 1-inch NPT ports allow for direct replacement in existing piping headers without extensive modifications.

Common Questions

What is the primary application for this Johnson Controls valve?
This Johnson Controls VG7241NT assembly is typically used for modulating steam or water in air handling units and terminal reheat coils where a failsafe open position is required.

How does the positioner improve performance?
The positioner acts as a mechanical relay, ensuring the actuator overcomes friction and fluid pressure to reach the exact position requested by the pneumatic controller.

Can the spring range be adjusted in the field?
While the 4-8 PSI spring range is fixed based on the internal spring rate, fine-tuning of the stroke and start point is managed via the integrated positioner settings.

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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.