Spirax Sarco TD42S2 Thermodynamic Steam Trap – Forged Steel, Socket Weld

The Spirax Sarco TD42S2 is a thermodynamic steam trap designed for robust performance in high-pressure saturated steam systems. Featuring a forged steel body (ASTM A105N) with socket weld end connections, this trap is engineered for reliable condensate discharge in demanding industrial environments.

The TD42S2 operates on the thermodynamic principle, using the difference in velocity between steam and condensate to open and close a stainless steel disc. This simple yet effective mechanism ensures efficient condensate removal while minimizing steam loss. A lower capacity variant (TD42S2LC) is available for mains drainage and steam tracing applications where condensate loads are reduced.

This steam trap fully complies with the Pressure Equipment Directive (PED) and is suitable for operating pressures up to 42 bar g with maximum temperatures of 400°C. For sub-zero applications down to -46°C, the TD42S3 variant (ASTM A350 LF2) is recommended.

The Spirax Sarco TD42S2 thermodynamic steam trap is suitable for a wide range of industrial applications including:

- Steam mains drainage – removing condensate from distribution headers and branch lines - Steam tracing lines – protecting heat tracing systems on pipes and vessels - Process equipment – draining steam-heated heat exchangers, jacketed vessels, and coils - Power plants – condensate removal in turbine auxiliaries and steam distribution - Refineries and chemical plants – high-pressure steam system maintenance

The LC variant is specifically optimized for lower condensate loads typical in tracing and mains drainage services.

Contact PC Engineering for pricing, availability, and technical support for the Spirax Sarco TD42S2 Thermodynamic Steam Trap. Call us or fill in our inquiry form — our engineers will respond within 24 hours.