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Hydraulic Seals

NBR U-Ring

NBR U-rings are bidirectional hydraulic seals designed for reciprocating piston and rod applications. The U-shaped profile provides excellent sealing performance with low friction and high wear resistance. The asymmetrical lip design optimizes pressure distribution, ensuring reliable sealing under varying pressures. Suitable for hydraulic cylinders in construction equipment, agricultural machinery, and industrial presses.

Standard and custom dimensions Material options for process conditions OEM / ODM and distributor supply
Primary material Nitrile Butadiene Rubber (NBR)
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Reference specifications

Product data

Values below are a reference starting point. Confirm the final compound, dimensions and test requirements for your operating conditions.

MaterialNitrile Butadiene Rubber (NBR)
Hardness (Shore A)85-90
Temperature Range-30°C to +120°C
Pressure RangeUp to 40 MPa
SpeedUp to 0.5 m/s
StandardGB/T 2879 / ISO 5597
ApplicationHydraulic cylinders, construction equipment, industrial machinery

Application fit

Typical industries and related products

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Construction EquipmentIndustrial MachineryEnergy

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