O-ring face seal adapter fittings use a straight thread and have a machined groove in the face of the male fitting to accept an O ring (of either Buna N or Viton material).
ORFS Hydraulic Fitting O-ring
This O-ring is compressed against the flat face of the female fitting for a leak proof connection. ORFS fittings are one of the most recent families of hydraulic adapter fittings and offer excellent leak protection at high pressures.
ORFS Hydraulic Fitting Seal
O-ring face seal (ORFS) installations are tube-style string fittings used to avoid leakages where two tubes or pipes attach. Due to ORFS installations’ track record as a top-sealing remedy in high-pressure applications, it is made use of extensively throughout environments that experience extreme vibrations.