Although appearing simple, the installation process of a hollow O-ring requires a proper method so that the seal fits correctly in the groove. This video provides instructions on how to properly install and uninstall a Parker TechSeal hollow O-ring. Following the installation instructions demonstrated in this video can help prevent overstretching the seal and therefore ensure the seal’s functionality.
Prior to the O-ring installation process, make sure the gland and the mating surfaces are clean and free of external contamination such as dust, debris, and other particles. The presence of those contaminants will create leak paths even when the seal is installed properly.
After the surface preparation step is completed, installing a hollow O-ring is fast and easy with two simple steps:
Step 1. Start at one point and work your way around the groove, pushing the seal into the groove.
Step 2. Once the seal is installed, lightly slide your finger around the seal to make sure that the seal is aligned correctly and evenly distributed along the groove track.
Seal replacement is also fast and simple: gently pull the old seal out of the groove and install a new one.
The incorrect method to install a hollow O-ring is to push the seal into the groove at one point and stretch the seal around the groove track. Stretching the seal will result in a fitting issue, inadequate sealing and ultimately seal failure.
For applications that need bolts or clamps to assemble the two mating components together, remember to use a star pattern to make sure that the compression force is applied equally on all points of the seal.
Parker hollow O-rings can be designed and manufactured in both standard and friction-fit series. Friction-fit means that the seal cross-section is oversized from the groove width, resulting in interference between the seal and the groove. The friction-fit feature enables the seal to remain inside the groove without the need for adhesives, O-ring lubricants or additional mechanical fasteners. This feature of Parker’s hollow O-rings is ideal for applications that would be inverted during assembly.
The friction-fit hollow O-rings are only compatible with grooves for friction-fit seals. Standard hollow O-rings, however, are compatible with most common O-ring grooves.
For more information about hollow O-rings, please visit the hollow O-ring website or call us at (864) 573-7332.
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