Models 40R/40Rl sentinel Relief valves

Non-code steam service sentinel relief valves


  • 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.
  • Tested and inspected for pressure setting and leakage.

General Application

Models 40R and 40Rl are suitable for sentinel (warning) on steam equipment, including steam turbines. they are intended as audible warning devices, not for pressure relief

Technical Data

Connections: threaded NPT
Temperature range: -60° to 850°f (-51° to 454°C)
Pressure range: 1 to 400 psig (.07 to 27.6 barg)