Spence Engineering P-T134-C1S1DA11 Temperature Pilot

The Spence Engineering P-T134-C1S1DA11 is a heavy-duty cast iron temperature pilot designed for precise thermal regulation in steam service applications. Engineered for compatibility with "E" series main valves, this T134 temperature pilot functions as a dual-purpose control, managing both temperature modulation and pressure limits to prevent over-pressurization in instantaneous heaters. It features a 120-220 degree F range, making it a standard choice for medium-temperature industrial processes and domestic hot water systems. The assembly includes a 700 style bulb with high-sensitivity bronze thermostat material and a 10-foot capillary, ensuring reliable feedback loops even in complex piping geometries. This pilot (identical to T134120220) utilizes a 1/4" metal trim to withstand the rigors of pilot-operated steam regulators. For contractors performing HVAC troubleshooting or boiler system overhauls, the Spence T134 provides the mechanical durability required to eliminate hunting and maintain stable setpoints under fluctuating load demands.

• Dual-Action Control: Simultaneously regulates steam temperature and limits delivery pressure to under 20 psi for enhanced system safety.
• High-Durability Construction: Cast iron body with bronze thermostat internals designed for long-term service in harsh industrial steam environments.
• Versatile Application: Explicitly designed for instantaneous heaters and heat exchangers requiring 120-220°F regulation.
• Direct Replacement: Fully interchangeable with Spence T134120220, minimizing downtime during steam valve repair.

How do I adjust the temperature setpoint on a Spence T134?
Adjustments are made by turning the adjusting nuts on the pilot. Increasing tension on the spring raises the temperature setpoint. Ensure the system is at a stable load before making final fine-tuning adjustments.

What causes a temperature pilot to hunt or overshoot?
In steam regulator troubleshooting, hunting is often caused by an oversized main valve or a partially plugged No. 4A bleedport. Verify that the capillary bulb is fully immersed in the flow and the 1/4" control pipe is clear of condensate.

Can the P-T134-C1S1DA11 be used for high-pressure applications?
The T134 pilot is specifically designed for systems where delivery pressure should not exceed 20 psi. For higher pressure requirements, the T124 series should be utilized.

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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.