Is the greater the compression of the O-ring, the better

The greater the compression of the O-ring, the better. Although the compression amount to some extent determines the sealing effect of the O-ring, excessive compression may lead to a series of problems.
Firstly, it should be clarified that the compression of an O-ring refers to the amount of deformation it undergoes when subjected to pressure. This deformation is crucial for ensuring the sealing performance of the O-ring. However, the greater the compression amount, the better the sealing effect. When the compression amount is too large, the O-ring may be subjected to excessive compression, resulting in a decrease in its elasticity and even plastic deformation. In this case, the sealing performance of the O-ring may not only not improve, but may also decrease, and even lead to sealing failure.
In addition, excessive compression may accelerate the aging and wear of O-rings, thereby shortening their service life. Therefore, in the design process, it is necessary to choose the appropriate compression amount according to the actual working conditions to ensure that the O-ring has both good sealing performance and a long service life.
The compression capacity of O-ring needs to balance its sealing performance with its service life and elastic recovery ability. Therefore, it cannot be simply assumed that a larger compression amount is better. In practical applications, suitable O-ring materials and sizes should be selected according to specific usage environments and requirements, and their compression should be reasonably controlled to achieve the best sealing effect and service life.