I would like to ask whether this type of mechanical seal installation is old-fashioned or advanced
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As can be seen from the diagram, the installation of the mechanical seal for this type of pump does not require measurement of the seal pressure; it is pressed into place directly at the step on the pump shaft by the impeller. Many of the pumps in our facility require such measurements, as they have shaft sleeves on their shafts, but this type of pump does not have those. I wonder whether this design is considered advanced or backward.
There is little contact between the mechanical seal components; in most cases, there are shaft sleeves used to determine the position (compression amount) of the rotating ring on those sleeves. I’ve never seen a design where direct pressure is applied in this way, and I’d like to hear the opinions of other experts as well
We use this type of mechanical seal only on some smaller pipeline pumps; on process pumps, they are almost all equipped with shaft sleeves and mechanical seals
Perhaps pumps with lower costs use this type of mechanical seal. It seems that if such a mechanical seal is damaged, it could damage the shaft, requiring its replacement; whereas a mechanical seal with a shaft sleeve will not damage the shaft.