Features Of Rectangular Sealing Ring.

1. 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.