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Flange
seals are typically used for applications
in which there are concerns about proper installation
or removal. If the flange is present to help
ensure proper seal alignment, the housing face
must be machined to be perpendicular to the axis
of the shaft.
The installation procedure must ensure that the
flange is touching the housing face completely
around the circumference. Sometimes a semi-liquid
bore sealant is applied to the seal O.D.;
the flange will help keep the sealant on the
O.D. until the seal is installed in the housing.
Additionally,
the flange will increase the metal case strength
and provide for easier removal when the seal needs
to be replaced. Figure 75 shows
a design featuring both a reverse channel case
and a flange. The design shown in Figure
76 features a double case (for added
rigidity) and a flange. Figure 77 shows
a seal with dual radial
dirt lips, a reverse channel case, and a flange.
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 75-77
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