Industrial shaft seals

gab.ru
V-ring
Берг
seals
АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 22
The V-ring shall be located in the medium to
be sealed.
The sealing lip is flexible and applies only a
relatively light contact pressure against the
counterface but sufficient enough to maintain
the sealing function. The light contact pressure
even allows the seal to run dry in some low
speed applications. The contact pressure varies
with the fitted width.
The flexible lip and hinge effect provide
adequate sealing even in applications with
considerable end play and shaft misalignment.
Due to the centrifugal force the contact
pressure of the lip decreases with increase in
speed. This means that frictional losses and
heat are kept to a minimum, resulting in better
wear characteristics and extended seal life. The
power loss reaches its maximum at a shaft
speed of approx. 12 m/s and is thereafter
gradually reduced up to about 20 m/s where it
will decrease to zero. The V-ring then serves
as a clearance seal and deflector.
Standard Designs
VR1 design
This is the most common design and is
available for shaft diameters from 2,7 to 2.020
mm, inclusive.
VR2 design
The body of this V-ring is wide and tapered.
This gives the seal a very firm hold on the
shaft. Seals of the VR2 design are available for
the most commonly used shaft diameters in
the range 4,5 to 210 mm.
VR3 design
These seals have a very narrow axial cross
section making for compact arrangements and
are often used in combination with labyrinth
seals. They are available for shaft diameters in
the range 135 to 630 mm.
VR4 design
These V-rings were designed as secondary
seals for heavy-duty applications where the
primary seal has to be protected against water
and/or solid contaminants. They have the
largest cross section of any V-ring design and
also permit the largest axial displacements.
They are available in the diameter range 450
to 2.010 mm.
VR5 and VR6 design
The heavy-duty large diameter style can easily
be fitted with a standard clamping band for
axial fixation in high speed applications. Ideal
for steel mills, ball mills and paper mills.
Design VR1 VR2 VR3 VR4 VR5 VR6
min † mm 2,7 4,5 15 450 300 300
max † mm 2020 2010 2010 2010 2010 2010
gab.ru 324Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 22