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Fisher™ TBX Steam Conditioning Valve
Fisher TBX Valve
Fisher TBX valves reduce both steam pressure and temperature to enable daily cycling of power plants.
In addition, they protect reheater tubes, condensers, and piping against excessive pressure, temperature, and enthalpy excursions during steam turbine trips.
Fisher™ TBX Steam Conditioning Valve


Critical Service
Noise Abatement, Steam Conditioning
Flow Characteristics
SA105, F22, F91
Operating Temperature
High Temperature
Pressure Class
Process Connection Type
Flanged, Butt Weld, RTJ
Shutoff Class
Class IV (FCI 70-2), Class V (FCI 70-2)
Valve Size
NPS 4, NPS 6, NPS 8, NPS 10, NPS 12, NPS 14, NPS 16, NPS 18, NPS 20, NPS 22, NPS 24, NPS 26, NPS 28, NPS 30, NPS 32, NPS 34, NPS 36, NPS 38, NPS 40, NPS 42, NPS 44, NPS 46, NPS 48
Valve Size Standard
Other Configurations
Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.


  • Combines pressure and temperature control in a single valve.
  • Rugged cage-guided design enables handling of full pressure drop of main steam.
  • Whisper Trim ™ III and WhisperFlo™ trims help to attenuate the noise by 30 to 40 dBA.
  • Use of the Fisher Bore Seal trim gives capability of standard Class V shutoff up to 593°C (1100°F). This unique balanced trim is field-proven.
  • FEA designed valve body can handle the most demanding applications without thermal stress problems.
  • Permits vertical stem orientation for ease of maintenance in most applications.
  • The cage is case-hardened for maximum life and is allowed to grow during thermally induced excursions. The plug is continuously guided and employs cobalt-based overlays for guide bands and tight metal-to-metal shutoff against the seat.


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