A better sealing of the X-rings against each other is mainly achieved by a double contact. Due to its geometry, the X-ring can be used in dynamic applications with rotating movements (1m / s).
X-Rings have four lips, which result in greater sealing surface. The four-lip seal was developed to achieve an improved lubrication of the seal and to avoid a rolling of the seal or spiral errors.
In contrast to O-Rings, which can roll in the groove and can cause a rotation, X-Rings will slide easily on. Also in regards to spiral errors X-Rings are much more resistant.
The dimensions of the X-Ring in accordance with the American standard AS568 and the associated O-Ring numbers. Compared to the grooves for O-Rings the standard grooves for X-Rings are deeper. For groove dimensions for X-Rings, there is a greater scope available, since X-Rings needs less pressure and can compensate for this. That means less friction and therefore less wear of the seal.
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