Aging is not fast: Unlike some sealing materials, rubber will gradually age naturally under pressure and reduce elasticity under any stress conditions. So seals actually have a certain service life, which is closely related to the quality of the sealing material. Due to the small pre compression amount after installation, the aging rate of the seal will be relatively slower.
Good stability: determined by the shape and characteristics of the rectangular seal, it will not twist after installation; The deformation after pre compression is small; When the hydraulic pressure changes, the shaping is also relatively small. The cross-sectional stability of the seals is good.
Good sealing performance: When using O-ring seals as end face seals, a "suction back effect" will occur when there are large pressure pulses. The first effect is generated by the pressure between the low-pressure side of the O-ring seal and the groove side in the groove. When pressure shock occurs, the fluid is discharged as the O-ring seal moves. When the pressure drops, a slight leakage similar to sweating occurs. When using rectangular seals, due to their geometric characteristics, there will be no sweating issues.
Strong anti extrusion performance: When using O-ring seals, under frequent or long-term pressure shocks, over time, a small amount of sealing material will be sheared and extruded from the low-pressure side gap. This phenomenon is called "extrusion damage". Under the same operating conditions, if rectangular seals are used, there will be no "extrusion damage".
High sealing pressure: The working pressure of O-ring seals is 32MPa, and the working pressure of rectangular seals is 50MPa. When O-ring seals are used for radial sealing and the pressure exceeds 10MPa, a retaining ring needs to be added on the low-pressure side to prevent damage caused by extrusion. When using rectangular seals, there is no need to set up a retaining ring.
