Johnson Controls T-3111-1 Valve Actuator

The Johnson Controls T-3111-1 Valve Actuator is a heavy-duty, proportional action pneumatic thermostat designed for integrated control of steam or water valves in terminal air conditioning units. This direct acting controller features a liquid-filled bulb element with a 42-inch capillary, ensuring precise sensing of return air temperatures. Built for rugged field reliability, the T-3111-1 provides seamless valve top mounting for VG7000 Series valves and is a 100% backward-compatible replacement for the legacy T-3110 series.

The unit operates on a maximum supply pressure of 25 psig and includes a built-in restrictor in the supply air tee, streamlining installation by removing the need for external components. Professionals will appreciate the external setpoint adjustment dial, which allows for rapid field calibration with 1-degree Fahrenheit increments. The piston top actuator maintains a constant effective diaphragm area throughout the entire stroke, delivering consistent force and stable HVAC pneumatic control even in demanding commercial environments. Its die-cast aluminum body and protected thermostat mechanism ensure long-term stability in mechanical rooms.

• Universal Compatibility: Mounts directly to Johnson Controls normally open, normally closed, or mixing valves from 1/2 to 2 inches NPT.
• High Precision Sensing: The remote bulb sensor and liquid-filled element provide uniform dial graduations and a high degree of accuracy.
• Streamlined Installation: Integral restrictor and valve-top mounting reduce labor time and inventory requirements for contractors.
• Customizable Range: Includes adjustable tabs to restrict temperature travel to as little as ±2.5°F from the setpoint.

Common Questions

Is the T-3111-1 compatible with the older VG7000 series valves?
Yes, the T-3111-1 is specifically modified to be compatible with VG7000 Series valves and serves as a direct drop-in replacement for the T-3110.

Does this unit require an external air restrictor?
No, the Johnson Controls T-3111-1 features an internal 0.007-inch restrictor built into the supply air barbed tee, simplifying the pneumatic piping layout.

What is the temperature control range for this actuator?
The bulb element is designed for a control range of 60°F to 150°F, providing a 2.5 psi/°F sensitivity for responsive proportional control.

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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.