Industrial shaft seals

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Industrial
факс
shaft seals
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Chemical and thermal resistance
The most important factor when selecting the
appropriate elastomer for a radial shaft seal is
its chemical resistance to the medium to be
sealed or excluded. The operating temperature
is another important factor. Heat accelerates
ageing of the elastomer and increases the
reactivity and aggressiveness of the sealed
medium.
As radial shaft seals are mainly used to seal
N lubricating oils and greases,
N hydraulic fluids (including
non-flammable fluids)
as well as a few other media, guideline values
are given in Table 5, page 70 for the
permissible operating temperatures, i.e.
temperatures at which the SKF seals are still
chemically resistant. The temperature range
quoted for a group of media means that the
sealing material is resistant when continuously
operated within this particular range.
The means that, within the group of media,
there are some which are compatible with the
elastomer, but also some which have a
detrimental effect on the elastomer.
The means that the seal material is not
resistant to media belonging to this group.
At the lower temperature limit quoted the
basic material will not be destroyed and will be
fully operational when the temperature is
increased again.
For the resistance of seal materials to media
not given in Table 5, reference should be made
to the section “Chemical resistance” or
information will be supplied on request.
gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 69 22