The Metal E-ring (also called W-Ring) can be designed with a large number and variety of convolutions. These seals provide much more springback than C-Ring or O-Ring.
When flange separation is of primary concern, Metal E-Ring(or W-Ring) is a primary selection.
Keep in mind: E-ring (W-Ring) – offers the greatest amount of springback of all metal seals.
Metal E-Ring (W-Seal) provides nearly full elastic recovery after the compressive force is removed. E-rings usually are left unplated meaning there is no ductile outer surface which can be deformed into the hardened mating surface by compression. As a result, unplated E-rings and other low load seals are more suited for reuse than other metal seals. O-rings and C-rings undergo mostly plastic deformation and therefore are usually discarded after one use.
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