Spirax-Sarco 70564 Thermo Trap

The Spirax Sarco 70564 is a professional-grade RTA-125 1/2" angle pattern thermostatic steam trap designed for the rigorous demands of balanced pressure steam systems. Built with a heavy-duty forged red brass body (ASTM B124), this trap features a precision-welded stainless steel element that is self-adjusting across the entire operating pressure range up to 125 psig. It is specifically engineered to discharge condensate and air at approximately 23°F (13°C) below saturated steam temperature, ensuring efficient heat transfer in vapor or vacuum two-pipe heating systems. The MNPT union inlet and FNPT outlet configuration allows for a secure radiator steam trap installation without disturbing existing piping. With a 0.196" orifice and a maximum operating temperature of 353°F, this unit effectively handles high-volume air venting during startup, preventing air binding and optimizing system performance in radiators, convectors, and small process equipment.

• Interchangeable internals: The stainless steel BP99 thermostat and valve seat can be replaced without breaking pipe connections, drastically reducing maintenance downtime.
• Corrosion resistance: Utilizing a forged brass cap and stainless steel internals ensures long-term reliability in harsh condensate environments.
• Self-adjusting operations: The balanced pressure capsule automatically adapts to varying steam pressures without requiring manual recalibration.
• Freeze-resistant potential: When installed in an angle pattern with correctly pitched piping, the design facilitates gravity drainage to prevent freezing.

• Does this replace older TA-125 or T-25 models? Yes, the RTA-125 series is the direct replacement for legacy Sarco models including TA-125, T-25, and TS-25.
• Can this trap be used in vacuum systems? Absolutely; it is rated for minimum operating pressures down to 25" Hg vacuum, making it ideal for low-pressure steam heating.
• What is the best way to prevent premature failure? Always install a pipeline strainer upstream to protect the stainless steel seat and valve head from dirt, scale, and assembly debris.

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.