TD700S/TDF700S Repairable In-Line Steam Traps

DRIP, TRACING: The TD700S Thermodynamic Repairable In-Line Steam Traps are commonly used as a drip trap on steam mains and steam supply lines. These traps are used on tracing applications; however, thermostatic traps are normally recommended for this service. Supplied with an integral strainer and optional blow down valve to protect the trap from contamination.

The internal working mechanism of the TD700S can be completely replaced while the trap body remains in line. Ideal for outdoor applications that are subject to freezing and for super heated steam conditions.

TDF700S is forged steel with full material traceability (MTR) for Petroleum Industry.

  • NPT, Socket Weld, 150# FLG, 300# FLG, and 600# FLG steam traps available.
  • 1/2″ – 1″ options available. 450 – 700 Max Capacity @ Max PMO (lbs/hr) available.
  • HS, Blowdown, HS & Blowdown models available.
  • Over 50 models available – call for more information


Catalog Spec Sheet



The Thermodynamic Repairable In-Line Steam Traps are simple and compact with a single moving part (disc) which opens to discharge condensate and closes in the presence of steam. Body materials available are Stainless and Alloy Steels for pressures up to 3,600 psig. Widely used on higher pressure drip applications and critical tracing applications (where condensate back-up is not permitted).

  • Rugged design and excellent for use with superheated steam
  • Operation is easy to check due to distinct cyclic operation
  • Single model operates over a wide pressure range in contrast to mechanical traps
  • Self-draining when mounted vertically to prevent freezing