Spirax-Sarco 54531C Thermodynamic Trap

For high-pressure drainage in steam tracer lines and main headers, the Spirax-Sarco 54531C is the industry-standard TD52 3/4" Thermodynamic Trap. Built with a hardened stainless steel body and disc, this unit is engineered to handle rigorous conditions, supporting a maximum operating pressure of 600 psig and temperatures up to 800°F. The thermodynamic disc trap design ensures periodic cycling to discharge condensate near steam temperature, keeping your lines clear and preventing back-up. This TD52 steam trap is particularly resilient in the field, as it remains unaffected by water hammer or superheat, making it a reliable choice for outdoor installations subject to freezing when mounted vertically. The electroless nickel-plated finish adds an extra layer of protection against corrosive environments, while the integral insulating cap reduces cycle frequency for improved longevity. For optimal performance, ensure a minimum operating pressure of 3.5 psig and keep back pressure below 80% of the inlet to maintain a positive shut-off.

• Rugged Construction: Features a hardened AISI 420 stainless steel disc and ASTM A743 Grade CA40F body for maximum wear resistance.
• Versatile Installation: Supports horizontal piping for standard drainage or vertical-down mounting for freeze-resistant applications.
• Maintenance Efficiency: Designed with a "Cool Blue" cap that allows for rapid inspection and disc replacement without breaking pipe connections.
• Reliable Discharge: The thermodynamic cycling action effectively handles superheated steam and high-velocity condensate without stalling.
• Corrosion Resistance: Electroless nickel plating protects technical components in harsh industrial or kitchen environments.

What is the best way to prevent the TD52 from failing prematurely?
Always install a 20-mesh steam strainer upstream of the trap. Fine debris can lodge between the disc and seat, causing the trap to blow through or cycle too rapidly, which accelerates mechanical wear.

Can the TD52 3/4" trap be used on superheated steam lines?
Yes, the Spirax-Sarco TD52 is rated for superheat applications. Unlike thermostatic traps, the thermodynamic disc is not damaged by high-temperature steam reaching the trap body.

How do I ensure the trap shuts off correctly against back pressure?
The maximum back pressure must not exceed 80% of the inlet pressure. If your return line pressure is too high relative to the supply, the pressure differential will be insufficient to seat the disc, leading to continuous steam loss.

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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.