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U-Cup/ Rod Seal

Rod Seal

A majority of rod seals are manufactured utilizing a precision knife trim process to ensure the sealing contact with the dynamic surface yields the best possible performance.  



The U-Cup (U-Packing or U-Ring) is the most compact and versatile of the many lip type seals available. In its several configurations, it may be utilized as an ID - Rod Seal, or an OD - Piston Seal.

The U-cup with long thin lips has very low dynamic friction and can accommodate out-of-round or eccentric components.  

Other configurations with short heavy lips provide a more reliable seal at low pressures and are better suited for sealing at high pressures.

Image of U-Cups  which feature pressure activated seal lips applying more sealing force with increasing pressure.  Many different profiles optimized to application requirements. Excellent for high pressures and dynamic speed with features optimized

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