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The reverse-acting TV/US-XR (Tube Fitting/Ultra Surface Sensing) cooling control valve opens on rising temperatures to allow cooling fluid in to keep a process from overheating. The valve may be installed so the valve’s thermal wax actuator is immersed in the process fluid or mounted non-invasively to the pipeline with a band-o-let fitting.

The wax actuator automatically and continuously senses the process temperature either directly or through thermal conduction to modulate the valve open/closed and regulate the flow of cooling media.

Typical Applications


These compact self-contained control valves can be used to control cooling media to economically remove heat from equipment or a process. Controlling air flow to a vortex cooling device controlling cooling media flow to a sample cooler in response to sample temperature are common applications.

The direct-acting model, TV/US-X is designed to monitor and control the flow of heating media to protect facility pipelines from freezing.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • All stainless-steel construction
  • Compact low mass – fast response
  • Ram-type plug for reliable shut off
  • Narrow temperature band
  • Unaffected by pressure variations


  • Self-operating – no external power source required
  • Prevents process overheating
  • Discharges minimum amount of media for temperature control
  • Maintains optimal process temperature
  • Quick and easy installation
  • Long service life




793 - 0X0000 - XXX

3/8” TV/US-XR

794 - 0X0000 - XXX

1/2” TV/US-XR


  1. Full open temperatures “XXX” available: 040°F, 045°F, 050°F, 060°F, 070°F, 075°F, 085°F, 095°F, 100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 130°F, 140°F, 150°F, 160°F, 170°F, 175°F, 180°F, 190°F, 200°F, and 210°F
    1. Closing temperature is typically 10°F below opening temperature for Reverse Acting valves.
  2. Optional Band-O-Let type attachment fitting must be specified when ordering.
  3. Viton is standard, others are available. 
  4. Standard fittings are Parker A-LOK, but Swagelok are available. The first 0 indicates the fittings.
    1. 0 = Parker fittings
    2. 1 = Swagelok


  • Sizes: ⅜”, ½”
  • Maximum Operating Pressure: 200 PSIG (13.8 BAR)
  • Maximum Valve End Temperature: 388°F (198°C)
  • Maximum Sensing End Temperature: 150°F (66°C) over set-point – limit 300°F (149°C)


TV/US-XR Product Sheet
TV/US-XR Installation and Maintenance Instructions
Instrument and Process Temperature Control Brochure

Filter Panel

TV/US-XR Tube Fitting/Ultra Surface Sensing Reverse Acting

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