Are all O-ring end face seal fittings the same

Date:08 May 2021

Over the nearly 40 years since its release, the  fittin […]

Over the nearly 40 years since its release, the  fitting has Flat Face Seal built a reputation for delivering a variety of important benefits.This can happen during transit, storage or assembly. When an ORFS fitting is assembled without an O-ring, the key sealing mechanism, the connection will leak. Sometimes the missing O-ring is caught, but not always. Either way, it adds to the time needed to assemble or reassemble! your connection. However, as the title of this post implies, there are many ORFS fittings in the market. All ORFS fittings improve reliability over metal-to-metal fitting styles  no doubt  but Parker has spent decades developing exclusive enhancements to our  ORFS fittings that eliminate potential issues and extend the fitting’s capabilities. Caused when an O-ring partially pops out of the groove and is pinched outside of the groove during assembly, O-ring pinch compromises the connection seal and can cause leaks.


The O-ring pinch issue can happen on adjustable SAE O-ring boss  port ends as well. This is due to thread exposure below the locknut that leads to a deformed backup washer, pinching the O-ring and creating an O-ring extrusion gap with the potential to leak. To fix this, Parker created the patented Robust Port Stud™. With a longer locknut, the Robust Port Stud eliminates exposed threads and the leak potential of adjustable SAE O-ring boss port ends. This enhanced port end comes standard on all Seal-Lok fittings with an adjustable SAE O-ring boss port end.  As you know, ORFS fittings were developed for high-pressure applications. Many of these are also in harsh environments where corrosion is a constant threat to equipment life.


When sourcing ORFS fittings, corrosion resistance should be on your radar. Parker offers ToughShield plating, which comes standard on our steel Seal-Lok ORFS fittings, and provides up to 1,000 hours of corrosion resistance – more than 10 times the SAE required standard - and outlasts the competition. See the results for yourself.Utilizing an elastomeric seal compound specially designed to address the needs of the natural gas market, this ORFS fitting improves ozone resistance and supports wider temperature range requirements . Seal-Lok for CNG has been tested and certified by TUV according to the  R110 standard for stainless and zinc-nickel plated fittings, as well as ISO 15500. It also passed Bonfire Testing in accordance with.


Seal-Lok for CNG is improving connection reliability in  applications for on-vehicle fuel systems and on infrastructure applications such as compressors, dryers, fuel dispensers and storage tanks.This ORFS fitting utilizes a patented metal seal that expands the fitting’s temperature and chemical capability. It achieves superior tube and hose connections at temperatures as low as -328°F and as high as 1200°F. It’s also available with a patented metal port seal on fittings with the SAE J1926 O-ring boss port end. Seal-Lok Xtreme has been extensively tested in the areas of thermal cycle and shock, as well as shown success in helium mass spectrometer and pressure testing. All of this makes it a good fit for applications like combustion turbines, storage and fueling systems, high-temperature engine compartments, instrument panels, and cryogenic equipment.