What are the reasons that can cause O-ring deformation?

I believe most customers who have used O-rings have experienced deformation of O-rings. O-ring is a common silicone rubber product that is widely used and the production process is not difficult. The selection of purpose, material, and size may also vary.
One thing that can be confirmed is that the majority of O-ring damage does not come from the design and pressure of the O-ring. If the design only unilaterally increases the pressure, it is impossible to cause damage to the O-ring seal. By exploring the reasons, we will find that if the working environment is high temperature and pressure, it may cause deformation of the O-ring seal or bite when it is squeezed into the gap. The typical sealing effect of O-ring deformation caused by compression is that it will generate contact pressure with the sealing surface during installation. When the pressure exceeds the pressure of the sealing medium, the sealing effect will occur, and vice versa, leakage will occur.

Here are some reasons that can cause O-ring deformation:
1. Compression and tension
2. Temperature
3. Medium working pressure

So how can we better and effectively avoid O-ring deformation
1. When choosing O-rings, the friction coefficient should be low and lubrication should be done properly.
2. The contact surface should be smooth, without roughness or stains;
3. When installing, ensure coaxiality, avoid excessive eccentricity, and ensure the rationality of the sealing system to prevent excessive dimensional errors