Description of the advantages of the seal

What are the manifestations of leaks caused by poor seal installation?
     1) The size of the moving and static ring seals is incorrect, damaged or not pressed;
2) The direction of the V-ring of the moving and static ring is reversed, or the opposite side of the installation;
3) The surface of the moving and static rings is not flat, and it is bumped or damaged during installation;
4) There are foreign objects on the surface of the moving and stationary rings;
5) The end face of the sealing cavity is not perpendicular to the axis;
6) There are corrosion points at the active part of the seal on the sleeve.
7) The spring force is not uniform, the single spring is not vertical, and the length of the multiple springs is different.