Service Life Of Metallic Bellow Seal

  In the use of Metallic Bellow Seal, the main wear part is the end face of the seal friction pair, because the wear amount of the seal end face is small under normal working conditions. For example, the wear amount of graphite friction pair with a balance coefficient of 0.75 is about 0.1 micron per hour in water and oil, that is to say, the wear amount of continuous operation for 10000 hours is about 1mm. It can be seen that the wear amount of friction pair generally will not affect the service life of the mechanical seal. Metallic Bellow Seal can generally be used continuously for 1 ~ 2 years, and they can also be used for 5 ~ 10 years on some occasions. The premise of the above service life is that the mechanical seal operates under allowable working conditions, such as shaft movement and runout, medium particle concentration, temperature, corrosivity and other factors.

External factors affecting the service life of Metallic Bellow Seal:

1. The displacement of pump shaft is large

2. The axial force is too large

3. The disturbance of pump shaft is too large

4. The auxiliary flushing system is unreasonable