Industrial shaft seals

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Radial
Берг
shaftАБ sealsbergab@ya.ru Тел. (495)-228-06-21, факс (495) 22
Large diameter radial shaft seals (LDS), standard designs
General
Heavy basic industries such as primary metals,
construction, wind energy, forestry, mining and
pulp and paper, provide a challenging
environment for radial shaft seals. Operating in
a wide range of speeds, temperatures and
environmental conditions, shaft seals are asked
to reliably retain lubrication while avoiding
harsh contamination from penetrating and
potentially damaging capital equipment.
Generally, seals for shaft diameters larger than
200 mm or 8in are known as large diameter
seals (LDS).
Certain small cross sections may require
special narrow diameter 5,33 mm (0.210in)
lugs with a width range of 1,6 to 3,2 mm
(0.0625 to 0.125 in)
The lugs are placed around the heel of the
seal in four, six or eight equally-spaced
locations, depending on the seal outer
diameter (Table 18).
Special design features for
large diameter seals
Spacer lugs
Spacer lugs may be furnished on all metal clad
designs to separate seals in multiple
installations and provide space for lubrication.
(fig 68).
The traditional fixed-width lugs are 9,5 mm
(0.375 in) in diameter and are available in
widths from 4,9 mm (0.125in) to 12,7 mm (0.5
in) in increments of 1,6 mm (0.0625 in). The
fixed-width lug is an available option on all
metal clad seals except HDS3. All HDS3 style
seals come standard with adjustable lugs. This
new concept allows the user to adjust lug
widths on the spot to suit individual
requirements.
All adjustable lugs are 9,5 mm (0.375 in) in
diameter and 12,7 mm (0.5 in) in width. They
may be adjusted to smaller widths in 1,6 mm
(0.0625 in) increments simply by removing the
steel washers. Also, the lugs may be removed
entirely.
Table 18. Number of spacer lugs needed
Spacer lugs
Fig 68. Spacer lug
Seal outside diameter
from incl. from incl.
pcs. mm in
4 762 30
6 762 1 143 30 45
8 1 143 45
gab.ru 198Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 22