Page 405 - SKF-bearing-housings

Special seals

groove in the housing. The plug consists of a Special seals
metal plate with a strip made of acrylonitrile-
butadiene rubber (NBR). Details of the per- In addition to the standard seal assortment,
missible length of the shaft end are listed in SAF and SAW pillow (plummer) block housings
the product tables. End plugs are identified by are available, on request, with high-tempera-
the designation EPR, followed by a size code, ture contact seals or high-speed contact seals.
for example EPR 7.
High-temperature seals
Using sealed bearings High-temperature contact seals (designation
LORP) consist of a PTFE labyrinth ring with an
Using sealed bearings in housings with stand- FKM (fluoro rubber) O-ring and a PTFE con-
ard seals is a good solution for highly contam- tact element. The PTFE contact element is
inated environments. The sealed bearing available separately (designation B-10785).
together with the housing seal and grease High-temperature seals can accommodate
provide three layers of protection († SKF operating temperatures up to 400 °F. The lim-
three-barrier solution, page 39). iting speed for the bearing can be attained.
SAF housings for sealed spherical roller
bearings are identified by the designation
SAF 5(00) W. Complete pillow blocks are iden- High-speed seals
tified by the designation SAF B225(00). For High-speed contact seals consist of an alu- 8
additional information, contact the SKF appli- minium labyrinth ring with an NBR O-ring
cation engineering service. (designation LOR) and a PTFE contact element
When using taconite heavy-duty seals, a (designation B-10785). With PTFE contact
sealed bearing does not enhance the sealing elements, the limiting speed for the bearing
effect during operation, but still protects the can be attained.
bearing against contaminants during
mounting.

WARNING!
Seals made of FKM (fluoro rubber)
exposed to an open flame or tempera-
tures above 570 °F are a health and envi-
ronmental hazard! Contact SKF for
detailed safety instructions.

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