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Springless
seals featuring
multiple sealing lips are common in applications
where heavy dirt and mud are encountered (such
as in farming equipment). Grease is packed between
the sealing lips. These designs are suitable for
applications in which shaft
speeds are less than 2.5 meters per second
(500 feet per minute).
Figure
81 shows a triple-lip seal (with
a double case)
designed for internal sealing. Figure
82 shows a triple lip seal (with
a single case) for external sealing.
NON-STANDARD
DESIGNS MAIN PAGE
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“Though
the standard shaft seals shown previously are
ideal for a wide variety of applications, they
are not the best solution to every design problem.”
Figures 81 & 82
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