1/2″ FNPT x 1/2″ FNPT Polypropylene Check Valve


SKU: 1/2" FNPT x 1/2" FNPT Polypropylene Check Valve Category:


These 685 series check valves can be used for a wide range of air and fluid applications.

  • Polypropylene
  • FKM seals
  • Hastelloy spring
  • High flow rate
  • Seat area open diameter: 0.438″
  • Positive seal at very low back pressure or slight vacuum
  • Cracking pressure: 1/3 psi
  • Check mechanism: Oring poppet
  • Maximum pressure: 125 psi
  • Maximum temperature: 140°F


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