Model 40R, 40RL


Model Descriptions

Model 40R: 1/2-inch or 3/4-inch male NPT inlet with top discharge to give visible warning of system overpressure.

Model 40RL: Same as Model 40R with plain lift lever.

Note: For other valves suitable for sentinel (warning) service, see Model 1 and Models 264, 265

Pressure and Temperature Limits

1 to 400 psig -60° to 850°F


  • Sentinel (warning) on steam equipment. Intended as audible warning device, not for pressure relief.
  • Steam turbines.


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Features and Benefits

  • All parts are Stainless Steel
  • Precision lapped beveled seats for optimum performance.
  • Pivot between spring and disc corrects misalignment and compensates for spring side thrust.


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Model 40R, 40RL

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