Features Of Rectangular Sealing Ring.
Jan 17, 2022
Slow aging
Different from rubber and some sealing materials, under pressure, it
will gradually age naturally and reduce its elasticity, so the seal has a certain
service life and is closely related to the quality of the sealing material.
Rectangular seals age relatively slowly due to their low pre-compression after
installation.
2. Good stability
Due to the shape characteristics of the rectangular seal, it does
not twist after installation, the deformation amount after pre-compression is
small, and the shape is also small when the hydraulic pressure changes. It is
collectively referred to as the seal with good cross-sectional stability.
3. Good sealing performance
When an O-seal is used as an end face seal, a "suckback
effect" will occur when there is a large pressure pulse. This effect is caused by
the pressure between the low pressure side of the O-ring seal and the side of the
groove in the groove. When a pressure shock occurs, the fluid is expelled with the
movement of the O-ring. When the pressure drops, a slight leak occurs in a "sweaty"
state. When a rectangular seal is used, it does not create problems like sweating
due to its own geometrical features.
In terms of bearing pressure performance, the
rated pressure of the O-type seal is 32MPa, while the rated pressure side of the
rectangular seal is 50MPa.
4. Strong anti-extrusion performance
When using O-seals: Under frequent or long-term
pressure shocks, a small amount of sealing material will be sheared and extruded
from the low-pressure side gap over time. This phenomenon is called "extrusion
damage". Under the same conditions, such as with rectangular seals, "extrusion
damage" does not occur.
5. High sealing pressure
The working pressure of the O-type seal is 32MPa, and the
working pressure of the rectangular seal is 50MPa. When the O-type seal is used for
radial sealing and the pressure exceeds 10MPa, it is necessary to add a retaining
ring on the low pressure side to prevent extrusion damage. When using rectangular
seals, there is no need for a retaining ring.
6. Interchangeable
In the original groove of the O-type seal, a rectangular seal of
the corresponding specification can be installed. Therefore, it has good
interchangeability in O-type seals.