Spence Engineering TA120220 Thermo Assembly

The Spence Engineering TA120220 Thermo Assembly is a heavy-duty vapor tension thermal element designed for precision temperature control in steam-operated systems. Built for compatibility with the Spence T14 temperature pilot and Type E main valves, this assembly operates within a specific 120-220°F temperature range, making it a standard for storage heaters, jacketed kettles, and large-scale domestic water heating. This replacement Spence thermostat features a rugged sensing bulb and flexible capillary tubing, ensuring reliable hydraulic pressure transmission to the pilot diaphragm to modulate steam flow based on demand. As a critical HVAC temperature regulator part, it provides the necessary sensitivity to prevent temperature overshoot in high-recovery applications. For contractors performing Spence valve maintenance, the TA120220 offers a direct-fit solution for restoring pilot-operated regulation without re-piping the entire station. This industrial-grade thermal element is engineered to withstand the rigorous inlet pressures and temperatures common in boiler rooms and mechanical sheds.

• Precision Setpoint Control: Optimized for the 120-220°F range to support stable output in commercial water heating and industrial process loops.
• OEM Compatibility: Designed as a direct replacement for Spence TA120220, ensuring zero-clearance integration with existing T14 and T134 pilot series.
• Durable Construction: High-quality sensing bulb and capillary materials resist corrosion and mechanical fatigue in steam environments.
• Vapor Tension Technology: Provides rapid response times to falling temperatures, activating the pilot and main valve to meet heat load requirements instantly.
• Versatile Application: Frequently utilized in storage tank heaters and plate heat exchangers where consistent thermal regulation is mandatory for safety and efficiency.

What pilot valves is the TA120220 compatible with?
This thermo assembly is specifically designed for use with the Spence T14 temperature pilot and is also compatible with the T134 series for dual pressure and temperature control applications.

Can this assembly be used for chilled water applications?
No, this specific model is calibrated for a 120-220°F range. For lower temperature or cooling applications, a different Spence thermal assembly with the appropriate temperature span must be selected.

How should the sensing bulb be installed for the best accuracy?
The bulb should be fully immersed in the active flow of the medium being heated. For storage tanks, ensure the bulb is placed where it can accurately sense the average water temperature, typically near the heater outlet.

This item must be shipped via trucking. Please contact us for a freight quote.

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.