Polyurethane O-Rings

Polyurethane O-rings are round-section sealing rings made from a tough, high-modulus elastomer. They retain the familiar O-ring form while offering strong resistance to abrasion and extrusion in suitable hydraulic and mechanical duties, provided the selected polyurethane grade is compatible with the fluid and environment.

Key facts

Family: O-Rings & Static Seals
Common types: Metric rings, Inch rings, High-hardness rings, Hydrolysis-resistant rings
Materials: Thermoplastic polyurethane, Cast polyurethane, Polyether polyurethane
Used in: Hydraulic couplings, Mining valves, Mobile equipment, Water cutting equipment, Fluid power manifolds

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Types

Metric rings
Inch rings
High-hardness rings
Hydrolysis-resistant rings

Materials

Applications

Hydraulic couplings
Mining valves
Mobile equipment
Water cutting equipment
Fluid power manifolds

What to send for a quote

inside diameter
cross-section
polyurethane grade
hardness
fluid type

Questions about polyurethane o-rings

What should I send to identify polyurethane o-rings?

Send inside diameter, cross-section, polyurethane grade, hardness, fluid type. Distinguish the ring from a standard rubber O-ring by confirming material, hardness and its original service position. A clear photograph, drawing or readable reference can resolve details that dimensions alone do not show.

How should I select polyurethane o-rings?

Check water exposure, fluid chemistry, temperature, clearance and compression because polyurethane formulations do not behave identically. Confirm the mating parts and operating environment before ordering, since an apparently similar size can use a different profile, material or internal arrangement.

Last updated: 2026-10-08