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X-Rings
X-ring description
X-rings offer twice the sealing performance of O-rings and are widely adaptable to various static and dynamic sealing scenarios. Compared to standard O-rings, the four-lobed X-ring doubles the sealing surface area. This dual-sealing structure requires less compression to maintain a reliable seal; the reduced compression effectively lowers friction on the sealing surface, significantly extending the seal's lifespan. Addressing the leakage problem caused by irregular parting lines common in O-rings, X-rings employ a staggered parting line design—placing the parting line at the lug gap, completely avoiding the sealing contact surface, structurally eliminating this potential leakage risk.
The structural design of X-rings comprehensively surpasses the performance of standard O-rings in rotary sealing scenarios. Its four-lobed configuration creates a tighter seal, effectively preventing spiral torsion failure of the seal. At the same time, this design allows the X-ring to fit a narrower groove width than the standard O-ring, and it can also be directly installed in the groove of the standard O-ring, providing good compatibility.
The measurement methods for the cross-section and inner diameter of X-rings are completely consistent with those for O-rings. Specific dimensions can be found in the product size chart. KODA’s X-rings fully cover both AS568 standard dimensions and metric dimensions, meeting diverse industrial assembly needs. The part numbering rules on the product page are clear: the letter “K” is uniformly added before the material, hardness, and size information. For example, part number KODA70230 represents an X-ring made of nitrile rubber, with a hardness of 70 degrees, and a specification of AS568 230.
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The core advantages of X-rings compared to O-rings
- Anti-torsion and anti-rolling: Effectively prevents torsional deformation within the groove, minimizing rolling displacement of the seal during equipment movement.
- Low friction and low extrusion: Lower coefficient of friction; compared to standard O-rings, only less radial extrusion force is required for effective sealing.
- Long life and wear resistance: Low friction results in less wear and significantly extends the seal’s lifespan.
- High sealing performance: Unique structural design provides excellent sealing performance.
- Optimized start-up performance: The gap between the sealing lips forms a lubricant reservoir, effectively improving sealing performance during equipment start-up and shutdown.