Polyurethane O-Rings are high-performance seals known for their exceptional wear resistance, flexibility, and tensile strength. These properties make them ideal for dynamic applications under high pressure, especially in hydraulic and pneumatic systems. They maintain elasticity even in cold conditions and resist oils, grease, and ozone. Their durability makes them a preferred choice in many industries. Want to learn more? Explore the full details below.
Polyurethane O-rings with a hardness of 70 Shore A provide excellent resistance to wear, pressure, mineral oils, greases, and aliphatic hydrocarbons, within a temperature range of -30 °C to +100 °C. Their medium hardness ensures a strong balance between flexibility and durability, making them ideal for general sealing applications
Polyurethane O-rings with a hardness of 90 Shore A offer outstanding resistance to wear, pressure, mineral oils, greases, and aliphatic hydrocarbons, within a temperature range of -30 °C to +100 °C. Their high hardness provides exceptional mechanical strength and extrusion resistance, making them ideal for demanding high-pressure static applications.
Polyurethane O-Rings are high-quality sealing components known for their excellent mechanical properties and versatility. Thanks to their abrasion resistance, high tensile strength, and flexibility, they are frequently used in dynamic systems. Typical applications include hydraulics, pneumatics, and various industrial sealing tasks. Polyurethane O-Rings offer a reliable alternative in environments where conventional materials like NBR fall short, especially under high pressure or heavy loads. Their resistance to oil, grease, aging, and wear makes them a favored choice in sectors where durability and performance are key. They also retain elasticity at low temperatures, making them suitable for a wide range of working conditions.
Polyurethane is a versatile material classified among thermoplastic elastomers. It is produced through a chemical reaction between a polyol and an isocyanate, often in combination with catalysts and additives. The result is a material with impressive mechanical characteristics and excellent resilience, ideal for dynamic applications such as Polyurethane O-Rings. There are two main types: polyether-based (AU) and polyester-based (EU) polyurethane rubber. Polyether types offer better hydrolysis resistance, while polyester types excel in abrasion resistance and tensile strength. Additionally, a distinction is made between thermoplastic polyurethane (TPU) and elastomeric PU. TPU is easier to process and recycle, whereas elastomeric types perform better under high loads.
Polyurethane O-Rings are popular for their mechanical performance. They offer excellent abrasion resistance, impressive tensile strength, and maintain flexibility even in low temperatures. These characteristics make them ideal for use under dynamic loads and high pressure. In addition, they are resistant to oils, greases, water, aging, and ozone, which significantly extends their lifespan. These features make them a preferred choice in both hydraulic and pneumatic systems.
Polyurethane O-Rings offer a wide range of impressive benefits that distinguish them from other sealing options. Due to their high abrasion resistance, they are well-suited for dynamic environments with constant motion and friction. Their strong tensile strength combined with flexibility ensures reliable performance even under high pressure. They also have a strong tolerance to substances like oils, greases, and fuels, largely due to the characteristics of polyurethane rubber. Moreover, they maintain elasticity in low temperatures and are hardly affected by aging, ozone, or oxidation. These specifications make them an attractive solution for many industrial and mobile applications.
Polyurethane O-Rings excel in wear resistance, making them ideal for demanding dynamic loads. The structure of polyurethane rubber enables them to withstand friction and mechanical wear over long periods. PU O Rings are therefore frequently used in hydraulic cylinders, pneumatic systems, and other moving components where reliability is crucial. Their application extends machinery lifespan and reduces maintenance needs and overall costs.
Polyurethane O-Rings provide strong resistance against oils, greases, aliphatic hydrocarbons, and various fuels. Thanks to the inherent qualities of polyurethane rubber, these seals maintain integrity even in environments with aggressive media. Polyurethane rings are widely used in hydraulic systems, fuel applications, and industrial machinery. While they perform well against light chemicals, they are not optimal for use with strong acids or ketones.
Polyurethane O Rings are designed to perform under high hydraulic and pneumatic pressures. The nature of polyurethane rubber ensures that these seals retain shape and functionality even under extreme stress. Polyurethane O-Rings are commonly applied in heavy industrial equipment, mobile tools, and hydraulic cylinders where consistent performance is essential. The combination of tensile strength and flexibility allows them to handle constant pressure fluctuations effectively.
Although the PU O Ring performs well across many industries, certain conditions reduce its effectiveness. Temperatures above 100°C can impair the mechanical characteristics of polyurethane rubber, making the seal less reliable. Furthermore, Polyurethane O-Rings are vulnerable to some chemicals like strong acids, ketones, and brake fluids. Continuous exposure to hot water, steam, or alkalis may also cause hydrolysis, particularly in polyester-based variants. For environments with aggressive chemicals or high heat, alternative materials may be better suited. Being aware of these limitations helps determine whether the PU O Ring is suitable for your specific application and avoids system failure.
Polyurethane O-Rings are known for their strength and wear resistance; however, their performance declines at elevated temperatures. When exposed to temperatures above approximately 100°C, the material properties of polyurethane rubber may deteriorate, compromising the sealing effect. As a result, Polyurethane O-Rings are not ideal for environments with continuous heat or superheated steam. In such conditions, the material may deform or weaken, increasing the risk of leakage.
While Polyurethane O-Rings offer impressive mechanical performance, polyester-based versions are prone to hydrolysis. When subjected to water, hot liquids, or humid environments, the structure of polyurethane rubber may degrade over time. This weakens the material and reduces sealing efficiency. In contrast, polyether-based variants show much better hydrolysis resistance. Therefore, they are often selected for environments where water exposure plays a significant role. Choosing the correct type of O Ring AU is crucial to prevent premature failure.
Polyurethane O-Rings are used across a wide range of industries where durability, abrasion resistance, and pressure tolerance are essential. They are ideal for hydraulic systems with high pressure and dynamic motion. Pneumatic systems and industrial sealing units also benefit greatly from the reliability of Polyurethane O-Rings. Thanks to the strong characteristics of the PU O Ring, these components are widely applied in mobile equipment, agricultural machinery, and construction machines. Their superior wear resistance and aging resistance make them a valuable alternative to traditional materials such as NBR.
Polyurethane O-Rings are extensively used in hydraulic and pneumatic systems due to their excellent pressure resistance and high durability. They provide consistent sealing in pistons, cylinders, valves, and actuators, even under intense dynamic loads. With the properties of the O Ring AU, these systems maintain long-term performance with minimal wear. Sectors such as agriculture, construction,
Polyurethane O-Rings are widely used for industrial sealing applications where dynamic loading is involved. In systems like valves, pumps, and belt drive units, Polyurethane O-Rings provide long-lasting and high-performing seals, even under continuous operation. The mechanical strength of polyurethane rubber helps minimize friction damage and leakage. This makes them ideal for use in sectors such as chemical processing, water treatment facilities, and heavy machinery production lines. Additionally, polyurethane o rings are often preferred over traditional materials due to their excellent endurance and stability under stress.
Polyurethane O-Rings are particularly suitable for environments with constant movement and dynamic pressure loads. They are frequently implemented in conveyor belts, roller bearings, and rotary couplings. These components provide long-term sealing performance even under harsh operating conditions. The features of the O Ring Polyurethane help significantly reduce wear and extend equipment lifespan. Industries such as food processing, logistics systems, and automated production lines benefit from the use of polyurethane rings, especially where precision and durability are critical.
Polyurethane O-Rings come in various types, each with specific advantages. The most common variants include AU (polyether-based) and EU (polyester-based) polyurethane rubber. AU types are favored for their superior hydrolysis resistance, making them more suitable for humid environments. EU types, by contrast, offer exceptional wear resistance and higher mechanical strength. Additionally, thermoplastic versions of polyurethane o rings are used widely for their ease of molding and recyclability. Renowned trade names such as Adiprene®, Millathane®, and Vibrathane® signify consistent quality. Choosing between an O Ring AU and a PU O Ring depends on the specific requirements regarding temperature, pressure, and media exposure.
Polyurethane O-Rings combine excellent mechanical durability with long service life, making them ideal for demanding dynamic applications. They offer high resistance to wear and chemicals such as oils, greases, and aliphatic hydrocarbons. Their flexibility at low temperatures and stability in harsh environments add to their reliability. Though not suitable for extreme heat or aggressive chemicals, the PU O Ring performs excellently in most hydraulic and mobile systems. With proper selection and installation, an O Ring AU reduces downtime and maintenance. For industries where polyurethane rings must withstand complex loads, these seals deliver consistent results with efficiency.