How are the end-face specific pressure and preload of the mechanical seal determined?
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I would like to ask what the differences are in the end-face specific pressure and pre-tightening force of machine seals, and what methods are used to determine them? The end-face specific pressure, as I understand it, is specified in the design and remains fixed; it cannot be adjusted. As for the preloading force, I’ve heard that in normal cases, the method of measurement involves determining the vertical distance from the end face of the stationary ring to the end face of the gland, and then measuring the vertical distance from the end face of the rotating ring to the end face of the gland. The difference between these two values represents the preloading force of the mechanical seal.
Measure the total compression amount; 0.7–0.75 of that value will suffice