What is the compression amount of the mechanical seal?
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What is the compression amount of a mechanical seal? What are the differences between single-seal and double-seal designs?
The compression amount of the mechanical seal varies depending on the type and model of the seal. For seals with small springs, it is generally about half of the total compression amount of the seal, while for those with large springs, it is usually around 2/3 of the total compression amount. A double seal refers to the presence of two sets of friction pairs. In the back-to-back configuration, these are two single seals placed back to back; in the series configuration, the two mechanical seals are installed in the same direction, one after the other. The compression amount is similar to that of a single seal, although most people prefer to have a slightly greater compression amount on the side where the medium flows Please forgive me if my expression is not good. Hope this helps!
Single spring with box: 4–6 mm; single spring without box: 10+ mm; multiple springs: 3–4 mm
3~5mm, double sealing: inner seal material; there is a sealing fluid between the inner and outer seals, and in the event of a leak in the inner seal, it will flow into the sealing fluid.
The compression amount of the bellows in mechanical seals is generally 5 mm, but this is not an absolute value; it usually needs to be calculated based on the compression length of the elastic element itself, which is approximately two-thirds of that value. Double-end mechanical seals typically consist of one medium seal and one external seal
There is no fixed value; it mainly depends on the specific pressure at the sealing surface, which needs to be calculated and is related to the pressure in the sealing chamber. . Big manufacturers can’t answer your questions; even something bought from a hardware store can give you the answer**