Shaft seals, as a distinct class of machine elements, serve to separate two functionally different spaces in such a way that no material exchange, or only a permissible one, can take place between them.
An overview of the classification of seals is shown in the following diagram. Starting from the aspect of motion, it leads to the functional principle and exemplary designs.
From the non-contacting sealing system to the combined solution, select a design for details and technical data.
A shaft seal separates two spaces at a rotating shaft so that no or only a permissible exchange of substances takes place, for example to keep lubricant inside a bearing or to seal a process medium. Depending on the requirement, it works non-contacting or contacting.
There are non-contacting seals (e.g. Type AD 200, Type A2), contacting seals (lip seals, mechanical seals, gland packings) and combined carbon seals (carbon bushings, carbon labyrinths).
Non-contacting shaft seals work almost wear-free because shaft and housing do not touch; they allow a small leakage. Contacting shaft seals seal via an element resting on the shaft (lip, packing, sliding ring) and are tighter, but subject to a certain amount of wear.
Our focus is on the radial sealing of rotating shafts. For many applications that initially look for axial solutions, a radial shaft seal is the right choice, simply get in touch with your operating conditions.
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