Kunkle Safety Valve Model 337

ASME Section VIII Air/Gas “UV” National Board Certified Safety Valve. PED certified for non-hazardous gas.

Product Features

  • Lift-pin lift device for easy manual testing
  • High capacity full nozzle design
  • Pivot between disc and spring corrects misalignment and compensates for spring side thrust
  • Flat bronze valve seats are lapped for optimum performance
  • Warn ring offers easy adjustability for precise opening with minimum preopen or simmer


  • Sizes 2″, 2 1/2″, and 3″
  • Pressures from 1 to 60 psig
  • Temperatures from -20° to 406°F
  • UV Stamp


  • Non-hazardous gas


  • Bulk hauling trailers/equipment
  • Light gauge tanks
  • Protection of high volume vacuum pumps and conveying systems
  • Protection of low to medium pressure high volume blowers, compressors, and pneumatic conveying systems
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