Johnson Controls VG7241ST+3008D Valve Assembly

The Johnson Controls VG7241ST+3008D is a rugged 2-way normally open valve assembly designed for precision control of hot water, chilled water, or steam in demanding commercial HVAC systems. This 2-inch NPT pneumatic valve features a robust cast bronze body with durable brass trim, engineered to withstand rigorous operational cycles. With an equal percentage flow characteristic and a high 46.2 Cv rating, it ensures stable modulating control and consistent heat transfer efficiency. The unit is powered by a 3008D exposed pneumatic actuator utilizing a 4-8 PSI spring range for reliable spring return safety. Professionals specify the VG7000 series for its field-proven reliability in terminal unit and air handling applications where tight shut-off and accurate flow regulation are non-negotiable. This assembly streamlines installation for contractors requiring a high-capacity pneumatic control valve capable of managing diverse media temperatures and pressures.

Key Benefits

• Equal Percentage Flow: Provides superior modulating control in the first half of the stroke, preventing hunting in high-demand hydronic systems.
• Normally Open Configuration: Ensures fail-safe operation by defaulting to the open position during pneumatic signal loss.
• Durable Construction: The cast bronze body and brass trim offer high resistance to corrosion and scaling in closed-loop systems.
• Pneumatic Actuation: The 3008D actuator provides responsive physical feedback and high close-off pressure ratings for 2-inch piping.
• NPT Connections: Standard 2-inch female NPT threads allow for easy integration into existing iron or copper mechanical piping.

Common Questions

What is the maximum operating pressure for the VG7241ST+3008D?
This Johnson Controls valve is typically rated for up to 400 psig at 150°F, though steam applications are limited to 35 psig. Always verify your specific system pressure drops against the 46.2 Cv rating.

Can the actuator be replaced without removing the valve body?
Yes, the VG7000 series design allows for actuator replacement or maintenance while the valve body remains inline, reducing downtime for the facility.

Is the 4-8 PSI spring range compatible with standard controllers?
Absolutely. The 4-8 PSI range is a standard industry calibration for pneumatic actuators, allowing it to work seamlessly with most building automation transducers and thermostats.

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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.