Industrial shaft seals

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Industrial
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shaft seals
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Selection of seal design and material
The choice of an appropriate seal design and
material is depending on the applications’
predominant operating conditions, such as
N type of lubrication,
N sliding velocity at the sealing surface
(counterface),
N vertical or horizontal mounting,
N misalignment or deviation from coaxiality
of the shaft.
The seal environment must also be taken into
account, for example, whether
N chemical or mechanical factors and/or
N thermal conditions
can influence seal performance. The available
space, requirements regarding sealing
efficiency and finally the viable cost must be
considered.
Depending on the application one or other
of the influences will dominate so that
universally valid rules for the selection of the
appropriate type or design of seal cannot be
given. The following comments regarding the
properties of the different seals should,
however, give some guidance.
The selection matrix with permissible
operating conditions for small diameter radial
shaft seals (SDS) on pages 98 and 99, for
large diameter radial shaft seals (LDS) on
pages 100 to 103 provides an overview of the
seals, their design features and their suitability
for various operating conditions.
It has not been possible to include all design
variants in the matrix; rather a representative
selection has been chosen. Detailed
information on the variants as well as the
seals shown in the matrix will be found in the
introductory texts preceding each table
section. Since only a limited number of
symbols have been used in the matrix for
reasons of clarity and space, it has not been
possible to exactly differentiate between the
various seal types.
gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 13 22