SKF - Industrial Shaft Seals

V-ring seals
Standard designs
SKF offers five standard V-ring designs:
• VA/VR1, the most common type of V-ring,
has a standard cross section and straight back
sideface. VA/VR1 is typically used to protect
bearing arrangements in gearboxes, electric
motors and drives.
• VS/VR2, that has a standard low cross section,
tapered back face and wide body, providing
a firm hold on the shaft. VS/VR2 is commonly
used in agricultural and automotive
applications.
• VL/VR3, designed with a very compact axial
cross section. VL/VR3 is commonly used in
confined spaces to enhance labyrinth seals.
• VE/VR4, designed as secondary seals for
heavy-duty applications where the primary
seal has to be protected against water and/or
solid contaminants. The design has the largest
cross section of any V-ring designs and
also permits the largest axial displacements.
VE/VR4 is available in the diameter range
300 to 2 010 mm (11.811 to 79.134 in.).
• VRME/VR6, a heavy-duty, large diameter
V-ring for applications with large axial displacements.
VRME/VR6 can be located axially
and radially on the shaft using a standard
band clamp. VRME/VR6 is primarily designed
to protect high-speed bearing arrangements
in rolling mills, paper-making and other large
machine applications. VRME/VR6 is available
on a made-to-order basis.
V-rings from SKF are available for the shaft
diameter ranges listed in table 1. If the shaft
diam eter lies in the appropriate range for two
V-rings, the larger V-ring, refering to the Seal
fitted with , should always be chosen († fig. 9).
In addition, special sizes and designs, including
split versions, can be made to order. Contact
your SKF sales representative for sizes outside
the standard range.
Table 1
Standard V-ring designs and size ranges
Design, globally outside North America VA VS VL VE VRME
Design, North America VR1 VR2 VR3 VR4 VR6
– mm (in.)
min 2,7 4,5 105 300 300
0.106 0.177 4.134 11.811 11.811
max 2 020 210 2 025 2 010 1 995
79.257 8.268 79.724 79.134 78.543
392