NBR FKM X Shape X Ring  Rubber Quad Ring Seal Quad Ring:

X shape o ring is a four lip seal with the shape similar to x, so it is also called X-ring. It is an improvement and improvement on the performance of O-ring. Its standard size is completely the same as that of American as568 standard O-ring, which can replace most O-ring occasions.
Compared with the O-ring, the X-ring has smaller friction resistance and starting resistance due to the formation of lubrication cavity between the sealing lips. Because of its flash position is in the concave of the section, the sealing effect is good. Non circular section, avoid rolling in reciprocating motion.
So the place where O-ring can be used can be replaced by X ring, and the sealing effect is very good, but the place where X ring can be used, O-ring may not be replaced, which is the reason why X-ring is more expensive than O-ring.

What Make X-Ring Seal Better?

1. Twice the Sealing Surface
Multi-lobed design provides more sealing surfaces than standard O-Rings.

2. Prolonged Seal Life
With multiple seal points, less squeeze is required to provide an effective seal. Less friction and wear will increase seal life and lower maintenance costs.

3. Prevents Spiral Failure
The“X” profile creates a stable seal that is more resistant to rolling in a groove than an O-Ring when used in a dynamic
application.

4. Reduced Leakage
Parting lines of X-Ring seals are located in the valley between the lobes away from the critical sealing surface.

5. Better Lubricant Retention
Grooves on the inside and outside diameter of these rings retain lubricant thereby lowering friction and extending packing life.

6. Less Force, Better Seal
Lower breakaway forces and reduced operating pressures make them ideal in reciprocating applications.

7. The Right Fit
X-Rings will fit in standard O-Ring grooves for most applications.