Sentry Equipment - Sampling Systems - Sampling Equipment

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Sentry Thermal Shutoff Valve (TSV)

Sentry Thermal Shutoff Valve (TSV)

Patented Design

Protect operators, analyzers and sampling components from high temperature liquids with a Sentry Thermal Shutoff Valve. The sensor/actuator is directly exposed to the sample, providing quick reaction time. Economical and highly reliable replacement for solenoid shutoff valve and temperature controller.


A reliable mechanical solution that requires no electricity to operate, the Sentry TSV provides positive closure. It must be manually reset after a trip, which ensures that sample flow is not resumed before the cause of the system upset has been corrected. The Sentry TSV should be installed downstream of the pressure-reducing device and upstream of analyzers, flowmeters and other low-pressure devices. After a trip, the upstream side of the Sentry TSV will be exposed to the full source pressure. A red indicator readily provides visual indication of valve position, and an optional switch is available to provide a signal for a remote alarm.


  • Suitable for system pressures up to 4400 psi (303 bar)
  • Totally mechanical design requires no electricity, air, or hydraulics
  • Simple push button reset
  • Optional dry contact for remote indication
  • Standard trip temperature is 120ºF (49ºC) with other temperatures available
  • 316 Stainless Steel construction

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U.S. Patent no. 5,826,790

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