Below we will look at the main difference between self-centralising and non-self-centralising bonded seals.
First and foremost we need to understand how bonded seals are made. Bonded seals made of a metal washer with a rectangular shaped cross-section. Afterwards a ring of vulcanised rubber, with a trapezoidal cross section is bonded to the inside of the metal washer. Together these form O-rings, which are used in hydraulic machines to ensure that all joints are secure and free from any fluid leaks. This design forms the basic design of a non-self-centralising bonded seal, which is used as a gasket.
To create a self-centralising bonded seal, the above-described design is usually altered. Self-centralising bonded hydraulic seals usually come with a design variation in the form of a thin lip attached to the inner part of the vulcanised rubber. It is this minimal design variation that comes with a host of added usually attributed to self-centralising bonded hydraulic seals. Although the tongue addition in self-centralising bonded seals seems minimal, it creates a huge difference from the non-self-centralising alternative in practical applications.
To understand the extent of the difference between these two different bonded seals, it is important to appreciate the benefits associated with self-centralising bonded hydraulic seals.
Since the addition of the lip on the vulcanised rubber allows for the gasket to centralise on its own when installed in hydraulic joints, it reduces the amount of time used to assemble hydraulic parts requiring their use.
Seal offset is one of the major problems associated with the use of non-self-centralising bonded hydraulic seals. However, this is eliminated with the addition of the extra lip on self-centralising bonded seals. This results in a perfect fit during assembly of hydraulic parts.
The use of O-rings bearing the self-centralising lip results in a stronger and tighter seal that eliminates all leaks better than the traditional non-self-centralising bonded seals. This ensures that hydraulic machines perform at their very best efficiency levels.
As you can see, there is a major difference in how self-centralising, and non-self-centralising bonded hydraulic seals look and work. This creates clear distinctions in the use as well.
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