AS-E01A elastomer bellow mechanical seal

Background Knowledge：
What are the requirements of the axical displacement values of mechanical seals
The axical displacement values of mechanical seals are required to be no more than 0.1mm, generally between 0.025~0.1mm. If too big, the specific pressure of the mechanical seal spring will be unstable, causing the wear or leakage of the seal face due to the vibrating of the shaft. The seal is damaged, which is more obvious in the graphite ring. In addition, because of the too big axical displacement value, partial corrosion, erosion or wearing will take place at the contacting part between the mechanical seal and the shaft (or sleeve). PTFE sealing ring are less elastic than rubber counterparts and thus more affected. Therefore, the axical displacement value needs to be changed from the original ±0.5mm to no more than 0.1mm, which can reduce the damage caused by the excessively big deviation. On the other hand, if the axical displacement value is too small, less than 0.025mm for example, it will have an adverse effect on the bearing.

In fact, the axical displacement value is also related to the shaft speed. The following figure picture shows the relationship between the axical displacement and the shaft speed, which can be used for reference during installation.