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 Internationalís oil seals can be custom designed to meet seal efficiency and drag requirements by adjusting spring force, lip length, lip interference and flex thickness.

Power Cunsumption VS. Shaft Dia. At Various Shaft Speeds

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