Johnson Controls VG1245AGH923GGA Valve Assembly

The Johnson Controls VG1245AGH923GGA is a premier 1/2 inch 2-way normally open ball valve assembly engineered for precise proportional control in demanding HVACR applications. This 4.7 Cv actuated ball valve features a robust forged brass body with stainless steel trim, ensuring high durability when regulating hot water, chilled water, or 50/50 glycol solutions. Designed with an equal percentage flow characteristic, the assembly provides superior temperature stability by maintaining a linear relationship between the control signal and heat output.

Equipped with a high-performance spring return actuator, the VG1245AGH923GGA ensures a fail-safe "open" position during power loss, protecting critical systems. The integrated thermal barrier extends the life of the electronic components by providing thermal isolation between the valve body and the actuator. This 24Vac/Vdc powered unit supports diverse control signals, including 0-10Vdc and 2-10Vdc, as well as 4-20mA modulation when paired with the included 500 ohm resistor. With a 200 psi close-off pressure rating and native NPT threaded connections, this assembly offers a reliable, low-maintenance solution for modern building automation systems.

• Precise Modulation: Advanced 4.7 Cv flow coefficient and equal percentage disk deliver accurate load tracking.
• Fail-Safe Reliability: Heavy-duty spring return actuator ensures the normally open state on power interruption.
• Hardware Protection: Features a factory-installed thermal barrier to mitigate heat transfer to the actuator.
• Corrosion Resistance: Stainless steel ball and stem prevent premature wear in high-duty cycle environments.
• Versatile Integration: Multi-signal compatibility (0-10V, 2-10V, 4-20mA) simplifies Metasys and third-party BAS field installs.

What is the primary function of the thermal barrier on this assembly?
The thermal barrier acts as an insulator between the valve body and the M9200 series actuator, preventing fluid-borne heat from damaging internal electronics and effectively raising the allowable fluid temperature limit for the assembly.

Can this valve be used for steam applications?
Yes, because this model utilizes stainless steel trim, it is rated for use with saturated steam up to 15 psig, unlike chrome-plated brass alternatives.

How do I configure the actuator for a 4-20mA control signal?
The VG1245AGH923GGA includes a 500 ohm resistor. By placing this resistor across the input terminals, you convert a 4-20mA current signal into a 2-10Vdc voltage signal compatible with the actuator’s logic.

This item is not eligible for free shipping.

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.