Spirax Sarco TD42L Thermodynamic Steam Trap

Spirax Sarco TD42L Thermodynamic Steam Trap, 3/4" NPT, is a maintainable steel steam trap engineered for condensate drainage in steam systems where robust performance and quick response are essential. The TD42L family features electroless nickel (ENP) body surfaces for corrosion resistance and a integral seating design with a hardened disc and seating surfaces, delivering durable, long-life operation in high-temperature condensate environments. It also incorporates an anti-airlock disc to vent air and help prevent trap performance degradation when air is present or the load is light. This 3/4" model is suited for main line drainage as well as process-load drainage applications, providing reliable condensate removal from steam mains and heat-transfer equipment while protecting downstream equipment and promoting energy efficiency. As part of Spirax Sarco’s Thermodynamic Trap line, the TD42L offers maintainable internals, enabling servicing without full replacement, and is designed for compatibility with standard Spirax Sarco installation practices and system configurations. In practical terms, it delivers the self-venting, fast-acting condensate discharge characteristic of thermodynamic traps, making it a common choice where robust construction and straightforward maintenance are priorities in heating, processing, and steam-utilization applications.