The O-RING and gasket difference

With the continuous development and progress of the social era, O-rings and gaskets are widely used in industry and life in today's society, but we may struggle with which kind of sealing is better? Next, I'll take you to understand the similarities and differences.

The similarities between the O-ring and the gasket:

Both meet this implicit condition: When the sealing contact pressure is greater than the pressure of the sealed medium, the sealing effect is maintained;

When the sealing contact pressure is less than the pressure of the sealed medium, the gasket or O-ring is pushed open, and a large amount of media leakage occurs.

The difference between the O-ring and the gasket:

The flat gasket seal contains gaskets, flanges and bolts, forming a complex static and indeterminate system; The sealing contact pressure is provided by the deformation of the bolts. The contact pressure distribution of the flat gasket is uniform when the medium pressure fluctuates and is greater than the contact pressure, leakage may occur.

In contrast: for working conditions with constant pressure, both can be matched; But for variable working conditions, when the pressure rises, it may exceed the contact pressure range of the gasket, medium jacked seal gap leakage. O-ring burst gasket.

In the application, the gasket is only used for static sealing, and the O-ring can be used for both static sealing and reciprocating linear motion dynamic sealing.

In terms of design, the traditional method of gasket sealing design is not strict enough, and the new flange gasket design specification is in the process of testing and research; The design of O-ring only needs to be determined according to the groove size, it is simple and reliable, convenient and practical.

Whether it is an O-ring or a gasket, the most important thing is to be suitable and can be better played its sealing role.