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 SEAL DRAG vs. SEAL EFFECIENCY
Oil seals are designed for positive sealing while creating minimal drag on the
rotating shaft. The figure at right shows typical effects of seal drag at various
shaft diameters and RPM. In applications where seal drag is a prime concern
to the designer, a balance must be struck between seal efficiency and the
friction resulting from radial lip load. deVries International’s oil seals can be
custom designed to meet seal efficiency and drag requirements by adjusting
spring force, lip length, lip interference and flex thickness.
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