Rubber Quad Rings

Quad Rings (also known as X-Rings) have a sealing function doubling that of an O-ring, and can be used in numerous static and dynamic sealing applications.

Compared to a standard o-ring, the four-lobed Quad Ring profile maintains twice the sealing surface. The double-seal action requires less squeeze to maintain an effective seal function. With the reduction in squeeze, this yields lower friction and prolonged seal life.

To prevent leakage, which typically results from a parting line’s irregular surface on an o-ring, the parting lines on an X-Ring are between the lobes, and away from the sealing surface.

X-Rings are also made to surpass the performance of a standard o-ring in rotary seal applications. The four-lobed design produces a more secure seal to counteract spiral twisting. This allows the use of a narrower groove width than a standard o-ring groove, but can also be used in a standard o-ring groove.

Advantages of X-Rings vs. O-Rings

  • Prevents contorting in the groove. The seal is not apt to roll in the groove with the corresponding movement.
  • Low friction. It requires less radial squeeze compared to a standard O-ring.
  • Less wear due to low friction, thus providing a longer service life.
  • Excellent sealing efficiency with its special profile.
  • Improved startup with the lubricant reservoir formed between the sealing lips.