Features Of Rectangular Sealing Ring.

Jan 17, 2022

  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.


You Might Also Like