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SKU: 223-000000-XXX (3/8"TV/HAT/RA)

Notes: See product sheet for available sizes and temperatures.

Product Description

Click here for Tube Valve Heat Actuated Trap product sheet
Click here for TV/HAT-RA Installation and Maintenance Instructions


As the fluid temperature increases to within the operating range of the TV/HAT-RA, the thermal actuator modulates the valve open. If the fluid temperature is above the acceptable range, the valve will continue to modulate open allowing additional fluid discharge. As the outlet temperature falls slightly, the valve then modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature even as operating conditions vary.


The TV/HAT-RA reverse acting valve can be used to regulate the flow of cooling water, glycol or other cooling media in applications requiring economical removal of heat from equipment or a process. Since the TV/HAT-RA valves open on rising temperatures, they can be used in many thermal relief valve applications. The TV/HAT-RA continually senses fluid temperature and automatically modulates to maintain desired temperature. Optimum operating temperature improves efficiency, reduces wear and conserves energy. ThermOmegaTech valves are designed around our exclusive Thermoloid® sensor/controller which is the most advanced and reliable thermal actuator of its type available today.


  • Regulates coolant flow to maintain constant temperature
  • Fully wetted actuator assures sensitivity to fluid temperature
  • Unaffected by pressure variations
  • Wide choice of set points
  • Operates in any position

Design Features

  • Compact, low mass for fast response
  • Corrosion resistant – Long service life
  • Stainless steel body, fittings, spring and plug
  • Ram-type plug for tight reliable shutoff
  • Operates in narrow temperature band
  • Easy to install