The difference between O-ring and C-ring

The O-ring and the C-ring are significantly different in several ways.

First of all, from the shape and structure point of view, the O-ring has a circular cross-section, simple design, no skeleton and self-tightening spring, mainly rely on the elasticity and flexibility of the rubber itself to achieve sealing. The C-type sealing ring presents a C-shaped cross-section design, and there is a circle of prominent arcs on the upper and lower sides to form a line contact seal. The C-ring also has the characteristics of self-tightening seal, when subjected to pre-tightening force, its arc part will be extended, and when subjected to internal pressure, the line contact part will be more and more compressed, so as to achieve a good sealing effect.

Secondly, from the application point of view, the O-ring is mainly used for static sealing to prevent the leakage of liquid and gas substances. In certain cases, it can also be used for sealing with continuous axial operation and low speed rotation. However, the O-ring requires high installation accuracy, and improper installation may lead to seal failure or even major failure. Therefore, during installation, it is necessary to pay attention to clean the installation location, remove burrs, apply lubricants, protect the sealing surface layer from damage, and confirm that the sealing ring size is correct.

On the other hand, the C-type sealing ring is not only suitable for static sealing, but also for dynamic sealing, and its sealing performance is excellent, and it is often used in valves, pumps and automotive engines. However, the installation requirements of the C-ring are also relatively high, and it is necessary to ensure that the seal is free from damage and deformation.

In general, there are obvious differences between O-type seals and C-type seals in terms of shape, structure, application and installation requirements. When choosing which sealing ring to use, it is necessary to comprehensively consider factors such as specific application scenarios, working pressure, temperature conditions and installation requirements.