Can the compression amount of the mechanical seal be adjusted?
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Today, the manufacturer came while we were repairing the mechanical seal of the centrifugal pump. Initially, it was planned to replace the seal with a new one, but the manufacturer said that adjusting the compression amount would be sufficient. It was previously believed that the compression amount of a mechanical seal could not be adjusted online. The pump uses a tandem sealing arrangement, and the flushing scheme is 52. May I ask whether the compression amount can be adjusted after the seal is installed on the shaft? How to adjust? Is it the moving ring that is adjusted in the end?
It is adjustable; for axial tightening, it can be adjusted using shims, while for radial tightening, the tightening position of the moving ring can be adjusted directly. .
Thank you. Today, the technician said that it’s possible to adjust the moving ring by adjusting the shaft sleeve, since the moving ring is fixed to the shaft sleeve; of course, in the end, the axial compression amount still needs to be fixed.
Yes, the modular type can be adjusted by simply changing the position of the shaft sleeve. There are various methods for adjusting the centralized structure, and the choice depends on the specific circumstances; however, the position of the shaft sleeve can only be used to adjust the compression amount of the secondary seal.
Yes, what is adjusted is the second stage, that is, the compression amount on the atmospheric side.