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Parker's E4 profile (piston) and E5 profile (rod) are non-symmetrical seals designed to seal both lubricated and non-lubricated air. To ensure that critical surfaces retain lubrication, the radius edge of the lip is designed to hydroplane over pre-lubricated surfaces. The standard compound for the E4 and E5 profile is Parker's proprietary Nitroxile ELF compound N4274A85. This compound is formulated with proprietary internal lubricants to provide “Extreme Low Friction” and excellent wear resistance. This compound provides extended cycle life over standard nitrile and carboxylated nitrile compounds.

Standard Materials
N4274A85 ELF Nitroxile
N4180A80 Nitrile
V4208A90 FKM
P5065A88 Low temperature urethane 

Alternate Materials: For applications that may require an alternate material, please contact your local Parker Seal representative.

Inch:  0.625" to 10" bore diameter
Metric: 43mm to 200mm bore diameter

Not all sizes available in all materials.  Please contact your Parker EPS representative.