Johnson Controls VA-8122-1 Valve Actuator

The Johnson Controls VA-8122-1 Valve Actuator is a professional-grade synchronous motor-driven actuator designed for precise proportional control in HVAC hydronic systems. This non-spring return actuator is engineered to provide accurate incremental positioning for valves in commercial air handling units and fan coil applications. Operating on 24 VAC or VDC, it delivers a consistent 22 lb shutoff force (98 N), ensuring reliable flow regulation and positive closure even in demanding building automation environments.

Built for versatile integration, the VA-8122-1 features a wide range of input signal compatibility, including 0(2) to 10 VDC, 0(4) to 20 VDC, and 0(4) to 20 mA. Its NEMA 1 enclosure provides essential protection for indoor installations, while the brushless motor design ensures long-term operational stability. Technicians will appreciate the magnetic clutch mechanism, which protects the gear train from damage if a stall condition occurs, maintaining the integrity of the HVAC valve control system without the need for auxiliary switches.

Key Benefits for Contractors

• Versatile Input Compatibility: Supports multiple voltage and current ranges (0-10V, 4-20mA) for seamless integration with diverse DDC controllers.
• Non-Spring Return Operation: Maintains the last valve position upon loss of power, preventing sudden system pressure spikes.
• Precision Flow Modulation: Offers consistent proportional response for optimized discharge air temperature and energy efficiency.
• Robust Shutoff Force: The 22 lb force rating ensures dependable seat pressure for leak-free operation in hydronic loops.
• Compact Footprint: Designed for easy installation in tight mechanical spaces, typical of fan coil units and AHU cabinets.

Common Questions

What happens to the valve position during a power failure?
As a non-spring return (non-failsafe) actuator, the VA-8122-1 will remain in its last commanded position if the 24V power supply is interrupted.

Is this actuator compatible with 4-20mA signals?
Yes, it accepts 0(4) to 20 mA signals along with various VDC proportional inputs, making it highly adaptable for various building automation systems (BAS).

Does this unit include internal auxiliary switches?
This specific model does not include auxiliary switches. If end-of-travel feedback is required, verify your controller's positioning logic or consider compatible hardware additions.

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.