Kunkle Sentinel Relief Valve Model 40R

Non-code steam service, sentinel relief valves

Product Features

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


  • 1/2″ or 3/4″ male NPT inlet with top discharge to give visible warning of system overpressure
  • Overall height: 5 1/4″
  • Weight: 1 lb
  • Pressures from 1 to 400 psig
  • Temperatures from -60° to 850°F


  • Steam
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