Johnson Controls VA7830-HGA-2 Actuator

The Johnson Controls VA7830-HGA-2 Actuator is a heavy-duty direct-coupled globe valve actuator engineered for precise modulation in commercial HVAC and industrial fluid control. This 24VAC spring return actuator provides a fail-safe stem-down position upon power loss, making it a critical component for steam and hot water regulation. Delivering 180 lb-in torque, it handles high-differential pressure applications across 1/2" to 2" valve bodies. The unit supports versatile control inputs, including 0-10Vdc proportional, 4-20mA analog, and floating control signals. Designed for longevity, it features a manual override for commissioning and a 48-inch cable for simplified field wiring. Whether managing chilled water systems or high-temperature steam up to 338°F, the VA7830-HGA-2 ensures repeatable accuracy and robust performance in demanding mechanical rooms.

• Multi-Signal Compatibility: Supports proportional (0-10Vdc, 2-10Vdc, 0-20mA) and two-position floating control for maximum job site flexibility.
• High Close-Off Force: The 180 lb-in (20.3 Nm) torque output ensures reliable shut-off against high dynamic pressures.
• Fail-Safe Reliability: Integrated spring return stem down functionality protects equipment during power interruptions.
• Universal Valve Fit: Compatible with 5/16" to 1" stroke globe valves, accommodating both linear and equal percentage flow characteristics.
• Rugged Construction: Built to withstand harsh environments with an operating range of 35°F to 248°F for water and up to 100 psi for steam.

Can this actuator replace older Johnson Controls pneumatic or electric series?
The VA7830-HGA-2 is designed as a modern direct-coupled electric alternative. Verify the threaded mounting collar compatibility; it typically fits standard Johnson Controls 1/2" through 2" globe valves without additional linkages.

How do I switch between 0-10Vdc and 4-20mA control?
The internal circuitry is field-selectable. Refer to the wiring diagram included with the 48-inch lead to set the appropriate impedance for your controller's output signal.

Does the manual override stay in place if power is restored?
The manual handcrank allows for manual positioning during setup; however, once 24VAC power is applied, the control signal will regain authority unless the unit is locked out for service.

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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.