X RING is the most commonly used in the hydraulic cylinder seal, it is a kind of typical lip seal, no matter for the piston and piston rod can obtain good sealing effect, u-shaped coil in low pressure situation, only by the interference of labial ministry seal deformation, due to the contact area is small, the friction force is relatively low, with increasing pressure, increase lip elastic deformation, stretching, With the increase of compression and bending stress, the radial compression force of U-ring automatically increases, and the contact length with the sealing surface increases continuously until the entire axial length of U-ring contacts with the sealing surface, so as to ensure good sealing performance under high pressure.

Action principle

X RING is a double acting seal with its own elastic sealing ability. The precompression during the initial installation creates a radial or axial contact stress that is combined with the system pressure to achieve the sealing function.

The superimposed sealing force increases with the increase of system pressure. Under pressure, the x ring acts like a fluid with very high surface tension. The pressure can be evenly transmitted to all surfaces

application

X RING is widely used, but mainly used for dynamic sealing, but its use is limited by pressure and speed.

Application of dynamic seals

Used for sealing reciprocating piston, piston rod, plunger.

A shaft or mandrel used to seal swing, rotation, or spiral motion.

Static seal application

Seal radially stationary parts such as sleeves, end caps and tubes.

Seal axially stationary parts, such as flanges, cover plates, etc.

Working parameters

Dynamic seal:

Reciprocating movement: ≤5Mpa no gear ring: ≤30Mpa use gear ring.

Rotation movement: ≤5Mpa use baffle ring.

Static seal: ≤5MPa no baffle ring: ≤40Mpa use baffle ring.

Operating speed

Reciprocating motion: ≤0.5m/s.

Rotational motion: ≤2m/s

Temperature range

NBR: -30 ° C to 110 ° C.

FKM: -30 ° C to 260 ° C.

Rotational motion: -30 ° C to 80 ° C.

Media: By choosing materials with different characteristics, it is possible to seal all liquids, gases and chemicals in a timely manner.

Compared with the O-ring, the x ring has less friction resistance and starting resistance due to the formation of a lubricating cavity between the sealing lip. Because its flying edge position in the concave section, so the sealing effect is good. Non - circular section to avoid rolling in reciprocating motion.

X RING has the following advantages over O ring

1. The shape of the common section is four sealing lips, which does not produce distortion in the groove, so it will not roll in the groove when reciprocating.

2. Friction is small, because it requires less precompression than the O-ring. Less compression means less friction and wear, and thus a longer life.

3. The sealing effect is very good, because there is a good pressure distribution on the section of the star ring, so as to obtain a very good sealing effect.

4. The lubrication cavity is formed between the sealing lip and the starting condition is changed.

5. Different from the O-ring, its parting flange is in the four concave of the cutting surface, that is, between the two sealing lips, and far away from the lip position.