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Description
Description X-rings are twin-action 4-lipped seals with an almost square cross-section profile. The X-rings achieves its sealing effect by being installed and compressed within an axial or radial installation housing. Under operating conditions, the pressure of the medium reinforces the sealing function. * A high degree of stability for dynamic application, as the X-ring is not susceptible to rolling within the groove (twisting) due to its almost square cross-section. X-rings require a lower degree of radial pretensioning. This gives rise to less abrasion due to the lower contact pressures in play. It is possible for a lubricant reservoir to be created between the sealing lips. Optimised sealing effect due to superior distribution of pressure over the almost square cross-section. No adverse effect created by the mould-separation ridge as unlike the O-ring, this is not located at the outer diameter but between the actual sealing lips. Application None Materials None| Temperature | None |
| Pressure | None 50 MPa |
| Speed | None 0.5 m/s |
| Medias | None Mineral hydraulic oils |
None
Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between 18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the elasticity and compression set are not as good. The NBR has good mechanical properties and good wear resistance. However, its resistance to atmospheric agents and the ozone is relatively low.
| Chemical resistance | Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel) Mineral oils and greases Fire-resistant fluids (HFA, HFB and HFC) Diluted acids, low-temperature alkaline and saline solutions Water (up to +100°C max) |
|---|---|
| Compatibility issue | Fuels with high aromatic content Aromatic hydrocarbons (benzene) Chlorinated hydrocarbons (trichlorethylene) Polar solvents (ketone, acetone, acetic acid, ethylene-ester) Strong acids Glycol-based brake fluids Atmospheric and ozone agents |
| Temperature range | -25°C/+100°C |