Industrial seal self study guide - SKF.com

SEAL DESIGN GROUPS (cont.)
VR2
VR2 is the original V-ring (fig. 3dd).
VR3
A narrow axial cross-section makes
VR3 ideal for certain applications
(fig. 3ee).
VR4
VR4 is heavy-duty large diameter
V-Ring (fig. 3ff).
VR5
The heavy-duty, large diameter VR5
is ideal for steel mills, ball mills and
papermills (fig. 3gg).
VR2
This is the original V-Ring (fig. 3dd). It is designed with a wide body
and tapered heel which holds the seal firmly against the shaft and acts
as a deflector.
VR2 is available in sizes ranging from .177” to 8.270” (4.50mm
to 210mm). It is generally used in contaminated industrial and
agricultural applications.
VR3
With its very narrow axial cross-section, VR3 is excellent for use in
pillow blocks to supplement or replace labyrinth seals or where the
fitted width (B 1 ) is not adequate for a style VR1 (fig. 3ee). VR3 is
available with nitrite and fluoroelastomer lip materials, in sizes that
fit shafts ranging from 4.13” to 79.724” (110mm to 2000mm).
VR4
Known as the heavy-duty large diameter V-Ring, VR4 is commonly
used in rolling mills as a dirt/water excluder (fig. 3ff). Sizes range
from 11.811” to over 78.740” (300mm to over 2000mm) shaft
diameter. VR4 is available in nitrile and flouroelastomer.
VR5
This heavy-duty, large diameter style V-Ring can be easily fitted with
a standard clamping band for axial location in high-speed and large
diameter applications (fig. 3gg). VR5 is ideal for steel mills, ball mills
and paper mills. It is available for shaft diameters from 11.811” to
over 78.740” (300mm to over 2000mm). This design can also be
machined to special widths and lip heights. Available in nitrile and
fluoroelastomer.
VR6
A new version, VR6, is similar except there is no “footer” extension
from the housing (see fig. 3hh). It is available by special quotation. VR4
should be used for most replacement applications. VR6 is a special
order profile mainly used for new machine applications and it will
eventually phase in as a general catalog item.
VR6
VR6 is a new heavy-duty profile
similar to VR5 except it fits a more
compact size (fig. 3hh).
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