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Kunkle Valve Model 537 Safety Relief Valves
Model 537 Safety Relief Valves
A safety relief valve that meet ASME section IV, ‘HV’, for low pressure hot water boilers and is National Board certified


  • Extra heavy construction helps provide long life.
  • Top guided disc assembly incorporates resilient seal in seating area.
  • Isolating diaphragm protects working parts from corrosion caused by discharged liquid.
  • Pivot between disc and spring designed to correct misalignment and compensates for spring side thrust.
  • Heavy duty lift lever.
  • Tested and inspected for pressure setting and leakage.