Spirax Sarco TD120 vs TD62 High-Pressure Thermodynamic Steam Traps: Technical Comparison

The Spirax Sarco TD120 and Spirax Sarco TD62 are heavy-duty thermodynamic steam traps engineered specifically for critical high-pressure steam distribution mains, turbine drains, and superheated steam headers. Both traps utilize a single moving stainless steel disc to ensure rapid, positive condensate evacuation without steam loss.

While both models deliver extreme operational reliability, the TD120 is built for ultra-high pressure power plant headers up to 250 barg, whereas the TD62 covers medium-to-high pressure industrial steam loops up to 62 barg.

Key Operational Differences

• Pressure Performance: The TD120 handles extreme superheated lines up to 250 barg, whereas the TD62 maxes out at 62 barg.
• Material Composition: The TD120 uses forged alloy steel (ASTM A182 Gr. F22) for high creep resistance, while the TD62 utilizes cast alloy steel (WC6).
• Thermal Endurance: The TD120 supports extreme temperature service up to 550°C, making it suitable for modern high-efficiency power generation utilities.
• Integrity & Design: The TD120 features a built-in strainer and low-capacity discharge layout to protect ultra-high pressure lines, while the TD62 includes a replaceable seat layout for rapid field servicing.

Technical Specification Comparison

Application Guidance

• Spirax Sarco TD120: Select for severe utility power generation, high-pressure superheated steam distribution, and extreme header drainage where pressures exceed 62 barg.
• Spirax Sarco TD62: Select for high-pressure process steam distribution mains, turbine casing drains, and superheat tracing networks operating between 15 barg and 62 barg.