Johnson Controls JG24A020 Motor Actuator

For field technicians managing high-limit thermal environments, the Johnson Controls JG24A020 represents a ruggedized on/off electric zone valve actuator engineered for precision water and steam control. Operating on a 24Vac power supply, this two-position motor actuator utilizes a reliable spring return mechanism to ensure a normally open (N/O) fail-safe position during a signal loss, protecting systems from overheating or stagnation. Specifically designed for high temperature HVAC applications, it sustains performance in ambient conditions ranging from -40?F to 160?F and handles media temperatures up to 250?F, making it the standard for JS Series valve bodies and various heat exchangers.

The JG24A020 actuator is built for rapid integration with 18" wire leads and a simplified hardwired connection. With a standard close-off pressure rating of 60 psi and 40 in-lb of torque, it provides the requisite force for two-way valve patterns in chilled water, hot water, and low-pressure steam systems. Its compact, vertical/horizontal mounting orientation and 7VA power requirement ensure it fits seamlessly into existing building automation systems (BAS) and zone control manifolds where durability in elevated thermal zones is non-negotiable.

• Fail-Safe Protection: The reliable spring return actuator design automatically drives to a normally open state to prevent system lock-ups during power interruptions.
• Thermal Resilience: Constructed for high temperature environments, supporting media up to 250?F in steam and hydronic heat exchange applications.
• Broad Compatibility: Engineered for Johnson Controls J Series and Erie VT Series valve bodies, ensuring a precise mechanical interface and drop-in replacement.
• Efficient Install: Includes 18-inch electrical leads for flexible hardwiring in tight mechanical plenums or valve boxes.

Common Questions

Is the JG24A020 compatible with proportional control signals?
No, this model is a two-position (on/off) actuator designed for 24Vac binary signals. For 0-10V or 4-20mA modulation, a different series actuator would be required.

Can this actuator be mounted in any orientation?
The JG24A020 is designed for horizontal or vertical mounting. To prevent moisture ingress and internal component wear, it should not be mounted upside down below the valve body.

What is the fail-safe behavior of this unit?
This is a normally open (N/O) device. In its de-energized state, the spring return forces the valve into the open position to allow flow, which is critical for preventing freezing or overheating in certain seasonal loops.

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.