Johnson Controls VA-4233-GGA-2 Actuator

The Johnson Controls VA-4233-GGA-2 Actuator is a heavy-duty, direct-coupled solution designed for precise proportional control of globe valves in commercial HVACR systems. Engineering-grade performance is delivered via a stepper motor that ensures accurate positioning for chilled water and hot water applications. This 24V spring return actuator provides a minimum 61 lb-in torque (271 N force), capable of driving 1/2" to 1-1/4" VG7000 Series valves without additional linkages. In the event of a power loss, the integrated mechanical spring return automatically drives the valve to a stem-up fail-safe position. For rapid commissioning, the VA-4233-GGA-2 features AUTO stroke calibration and switch-selectable input signals, including 0-10Vdc and 4-20mA. A 48-inch cable with wire leads simplifies field wiring, while the 76-second travel time maintains stable loop control. The unit includes a manual hand crank for override during maintenance or system testing, ensuring operational flexibility for HVAC contractors.

• Universal Compatibility: Direct-mount design works seamlessly with globe valve actuators like the VG7000 series, eliminating the need for complex mounting kits.
• Automatic Fail-Safe: Reliable spring return mechanism ensures the HVAC valve returns to a safe stem-up position during power interruptions.
• Simplified Commissioning: Features AUTO stroke calibration to automatically scale feedback and input signals across the actual valve stroke.
• Flexible Signal Input: Field-selectable proportional control supports 0-10Vdc, 2-10Vdc, 6-9Vdc, and 4-20mA to match any building automation system.
• Durable Stepper Motor: Uses brushless technology for high-torque performance and long-term actuator reliability in demanding environments.

How do I calibrate the VA-4233-GGA-2 for my specific valve stroke?
This model features an AUTO stroke calibration function. Upon initial power-up, the actuator automatically detects the valve's end-of-travel limits and scales the input signal accordingly, reducing setup time for HVAC technicians.

Can this actuator handle steam applications?
Yes, when coupled with appropriate Johnson Controls bronze globe valves, the Johnson Controls VA-4233-GGA-2 is rated for saturated steam up to 15 psig, as well as chilled and hot water systems.

What is the purpose of the manual hand crank?
The hand crank allows for manual positioning of the valve actuator without power. This is essential for system flushing, manual override during controller failure, or verifying valve movement during HVAC maintenance.

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.