3966170670 PACKING;U-RING for Hitachi ZW250-6

Engineered to Prevent Leakage in Hydraulic Cylinders

The U-ring packing is a precision sealing component designed specifically for reciprocating motion applications such as hydraulic cylinder pistons and rods. This genuine Hitachi U-ring features a distinctive asymmetric lip geometry that provides an effective dynamic seal, maintaining fluid containment under pressure while accommodating the axial movement of the rod or piston. Trust this packing to deliver consistent sealing performance across a wide range of operating pressures, speeds, and temperatures.

Optimized Polyurethane or Elastomer Formulation

Manufactured from high-grade polyurethane or specially formulated elastomers, this genuine U-ring is selected for its exceptional wear resistance, low compression set, and high tensile strength. The precisely engineered lip profile ensures optimal contact pressure against the mating surface, creating a reliable seal that actually tightens as system pressure increases. The robust cross-section resists extrusion under high-pressure conditions, while the flexible lip maintains effective sealing even with minor surface imperfections or misalignment.

Genuine Hitachi: Protect Your Hydraulic Systems from Leaks and Downtime

A worn, extruded, or improperly specified U-ring leads to internal or external leakage, reduced system efficiency, and eventual cylinder failure. Aftermarket packings often use inferior materials that harden, swell, or lose their sealing force prematurely—resulting in costly downtime and repair expenses. This genuine Hitachi component is manufactured to meet exact OEM specifications for material composition, hardness, and dimensional accuracy. Ensure reliable hydraulic performance and extended component life with the packing engineered specifically for your Hitachi equipment.