O-Ring Face Seal Fittings
O-Ring Face Seal Fittings
O-Ring Face Seal (ORFS) hydraulic fittings have a straight thread and flat face with an o-ring groove machined in it. A seal is created when the o-ring is compressed onto the flat face of the female fitting. ORFS-style adapters are very effective in reducing leakage at higher pressures, and offer advantages over all-metal fittings. All fittings will leak if they are over- or under-tightened, but all-metal fittings are more likely to leak because they must be tightened to a higher and narrower torque range. This makes it easier to strip threads, or crack and distort fittings, which prevents a proper seal from forming. As such, ORFS fittings provide a more reliable seal than all-metal fittings.