The two most popular hydraulic O-ring fittings are O-ring boss fittings and O-ring face seal fittings . Do you know what’s the difference between them? While both need to create a tight seal within a hydraulic system, each serves a different purpose.
What’s The ORFS Fittings?
O-ring Face Seal, commonly abbreviated as ORFS, is a standard recognized under SAE J1453 and ISO 8434-3. As the name suggests, ORFS fittings utilize an O-ring located at the face of the fitting to ensure a robust seal. These fittings are typically constructed from materials such as carbon, nickel-plated carbon, or stainless steel. They primarily use Buna-n or Viton O-rings with a 90 durometer rating, which settle into a groove on the face of the fitting.
What’s The ORB Fittings?
The O-ring Boss, or ORB, Defined by the SAE J1926 standard. ORB fitting is known for its adaptable thread design, making it a preferred choice for medium to high-pressure hydraulic applications. In ORB fittings, the male thread carries an O-ring at its base which aligns with a chamfer machined into the female counterpart, thus forming a leak-proof seal ideal for various applications.
Distinguishing Between ORFS and ORB Fittings
Both ORFS and ORB fittings employ an encapsulated O-ring to create a seal, albeit in different manners. The key difference lies in the positioning of the O-ring. In ORFS fittings, the O-ring is situated in a grooved area at the end of the male thread, while in ORB fittings, the O-ring is placed at the base of the male thread. When ORFS fittings are assembled, the flat sealing surface of the female fitting compresses the O-ring on the male fitting as they are threaded together, creating a seal. On the other hand, ORB female fittings have a grooved “boss” before the first thread that encapsulates the O-ring on the male thread, also creating a secure seal.
For a deeper understanding of our O-ring face seal and O-ring boss seal hydraulic adapters, feel free to reach out to our sales team who are on standby to provide more details.
