Why are seal elasticity and material important

The extruded sealing ring relies on the self-resilience of the sealing material to obtain a seal, while the lip seal may have eccentricity, and it also needs to rely on the elasticity of the material to compensate for the insufficient contact stress of the seal, so the elasticity is important for the sealing effect of the sealing ring. very important. 

Regardless of whether it is at high temperature or low temperature, very low temperature and very high temperature describe an instantaneous temperature, that is, a certain material sealing ring can withstand the instantaneous extreme temperature, as long as the sealing ring is close to the temperature limit and is in a certain temperature for a long time. 

At the extreme high temperature level, the seal will soon fail, then at low temperature, the sealing material gradually loses its elasticity until it reaches the crystallization temperature of the material, which is called glass transition phenomenon, and then loses elasticity. The seal fails, so the material is a sealing ring. The core and sealing ring design are based on material selection