The most commonly used sealing component in seals is rubber sealing rings, which are usually classified according to their main materials, characteristics, and motion forms.

1. Classify different sealing rings according to their materials, typically using nitrile rubber sealing rings. Other common materials include silicone rubber seals, fluororubber seals, etc.

2. Classify according to the characteristics of the sealing ring

This classification is mainly based on the usage conditions and materials of the sealing ring. It can be divided into high-temperature resistant sealing rings, low-temperature resistant sealing rings, high-pressure resistant sealing rings, wear-resistant sealing rings, corrosion-resistant sealing rings, etc.

3. Classify according to their movement form

There are usually two types of sports forms, namely dynamic sealing and static sealing. Static sealing refers to sealing on two stationary surfaces. The most widely used O-ring in sealing is mainly used in static sealing, followed by gasket sealing. In dynamic sealing, it can be divided into contact sealing and non-contact sealing according to whether the sealing ring is in contact with the parts that move relative to it. Among them, the rubber sealing ring is a contact sealing method. In dynamic sealing, common forms of rubber seals include rotary shaft lip seals and reciprocating seals.