Rotary Union is a device which can be connected to a rotating
shaft and allows for the leak-proof transfer of fluids to and from a
stationary source service. When selecting the correct rotary union model
for your particular application, the vital components to consider include
the rotary seals and the bearing support systems.
1) Filton® Bellows Seal
For the majority of applications, the Bellows Seal is the most
efficient seal used. It does not contain any elastomeric components which
make it suitable for rotary applications ranging in ambient temperatures
from subzero to 300oC. It is particularly useful for steam, hot water and
heat transfer applications.
2) Filton® Mechanical Seal
The Mechanical Seal is generally used for higher pressure and
higher speed applications such as hydraulic systems and machine tools. It
is also used in applications where higher speed shafts are involved. The
springs of the mechanical seal are located outside of the fluid flow area
which improves performance.
Both variations of seal provide exceptional quality of the seal contact
faces; each are lapped to a high degree of accuracy and are checked
optically to ensure that the correct flatness is obtained.
BEARING SUPPORTS SYSTEMS:
Depending on your application, there are a range of different bearings
that are available including standard ball bearings, angular contact
bearings, carbon journal and thrust bearings. Although the ball bearings
used generally have an upper temperature limit of 180°C, they are more
suitable for higher speed applications and the upper temperature limits
can be exceeded in some cases with special bearings and lubrication.
Carbon bearings, although they have lower speed limit values, are useful
for higher temperatures up to 300°C. For more information about bearing
Back to Filton® Home Page