Johnson Controls VG7241NT+423GGC Valve

The Johnson Controls VG7241NT+423GGC is a precision-engineered 1-inch NPT electric globe valve assembly designed for demanding chilled or hot water applications. This 2-way normally open valve features a rugged cast bronze body and brass trim, ensuring durability in high-cycle HVAC systems. With a flow coefficient of 11.6 Cv and an equal percentage flow characteristic, it provides stable modulating control for air handling units and heat exchangers. Powering the assembly is the 423GGC spring return proportional actuator, which offers versatile field-selectable control signals including 0-10Vdc, 2-10Vdc, and 4-20mA. Operating on 24Vac/Vdc, the unit includes dual SPDT auxiliary switches for precise feedback and end-switch positioning. The spring return safety mechanism ensures the VG7000 series valve returns to its fail-safe open position during power loss, maintaining system protection in critical environments.

Technical Benefits:

• Universal Control Compatibility: Accepts multiple analog inputs (0-10Vdc or 4-20mA) for seamless integration with BAS and DDC controllers.
• Superior Flow Modulation: The equal percentage flow plug design helps linearize the heat output of the coil relative to the valve stroke.
• Enhanced Field Feedback: Integrated 2-SPDT auxiliary switches allow for remote monitoring of actuator position without additional hardware.
• Fail-Safe Reliability: Mechanical spring return functionality ensures the valve opens during power interruption to prevent system freeze-ups or stagnation.
• Industrial Build Quality: High-tensile bronze construction provides excellent resistance to corrosion and fluid scaling.

Common Questions:

How do I configure the input signal for this actuator?
The 423GGC actuator features dip switches under the cover to select between 0-10Vdc, 2-10Vdc, or 4-20mA control signals to match your controller output.

Can this valve be used for steam applications?
While the VG7241 series is optimized for water and glycol solutions up to 281°F, always verify the specific pressure and temperature ratings for low-pressure steam versus the specific trim installed.

What is the purpose of the manual override on this assembly?
The manual handle allows technicians to position the valve during commissioning or power failure, but it must be disengaged for the proportional control to function correctly.

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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.