No matter what type of port, tube or hose ends your fittings have, it's important to know and use the proper assembly and installation steps. Today we are talking about O-ring Face Seal (ORFS) fittings. The face of the ORFS tube end has a soft seal in the captive o-ring groove (CORG). When the fitting is assembled properly this seal is compressed in the CORG, which is a precision machined groove in the fitting body face, to form a leak tight seal. This makes proper assembly key to ensuring leak-free O-ring face seal connections in your system.
Watch the video to learn the proper process for assembly and installation of O-ring face seal fittings, or follow the steps outlined below.
Proper O-ring Face Seal (ORFS) fitting assembly and installation steps:
Step 1: Inspect the tube end for a O-ring.
Start by inspecting the ORFS fittings to make sure that the O-ring is properly installed in the groove (CORG). If an O-ring is not present, you will need to properly install one before moving to the next step. Note: Parker provides Seal-Lok O-ring Face Seal fittings with Trap-Seals preinstalled. These patented trapezoidal shaped seals provide optimum seal retention to prevent fall-out during shipping and assembly, and also prevent seal pinch during assembly.
Step 2: Mate the fitting face and connection.
Place the flat face of the mating connection against the fitting face so that it makes complete contact with the O-ring.
Step 3: Thread and torque.
Thread the nut onto the fitting body by hand. Then tighten it to the recommended torque values shown in the Assembly and Installation section of the Parker Catalog 4300.
By following these steps your O-ring face seal fitting connections should be leak-free. To help you ensure that all of your hydraulic fitting connections are installed leak-free, Parker Tube Fittings Division has created a series of tube and port end assembly and installation videos for the most common hydraulic fitting connections, which will be shared on TFDtechConnect.com over the next couple of months. You can also find detailed assembly and installation information for port end threads and tube fittings in the Assembly/Installation section of our Catalog 4300.
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Contributed by Burleigh Bailey, senior product engineer at Parker Tube Fittings Division
Additional related content about hydraulic tube, hose, and port fitting connections:
Non-Adjustable Parallel Thread Port End Assembly Instructions for Hydraulic Fittings
Tapered Thread Port Assembly Instructions for Hydraulic Fittings
Turn vs. Torque? How Making the Right Choice Keeps Your Hydraulic Fitting Connections Leak-Free
Extreme Temperatures Are No Issue for Parker's Patented Metal Seal for ORFS Fittings
Tube End Preparation Best Practices for Leak-Free Hydraulic Tube Fitting Connections
A Closer Look at O-ring Face Seal, 37° Flare, and 24° Flareless Fittings