Polyurethane O-rings
Polyurethane O-rings are made of millable Polyurethane rubbers distinguished by two types; one is polyester urethane (AU), the other is polyether urethane (EU). AU type polyurethane o-rings have outstanding oil, fuel and solvent resistance but can be attacked by hydrolysis.
EU type polyurethane O-rings are not attacked by hydrolysis and still offer a fuel and oil resistance comparable to low ACN ( 18~22% ACN) nitriles or HNBRs. Any type polyurethane O-rings has excellent wear resistance, high tensile strength and high elasticity in comparison with any other elastomers.
We also can offer any type thermoplastic urethane (TPU).
Service Temperature: The Service Temperature of PU is -40° C to 80° C, shortened lifetime up to 100 C.
Hardness: 60 to 93 Deg Shore A are available.
Color: Black, transparent, green, orange are available, or any assigned Color from customers.
Application: Polyurethane O-rings are usually are applied in mechanical industries, especially in places that require higher wear resistance and higher strength.Polyurethane O-Rings are especially suited wherever O-Rings are subject to dynamic loads. This includes, for example, applications in hydraulics, pneumatics and in a wide range of other critical areas. In many cases, polyurethane O-Rings are used instead of NBR due to their high mechanical strengths.
O-rings Polyurethane
O-rings Polyurethane Polyurethane O-rings are made of general purpose polyurethane rubber, which is known for its combination of hardness and elasticity. Polyurethane O-rings have excellent abrasion resistance and high breaking strength. O-rings of polyurethane are resistant to oils, aging, ozone, heat, electricity, as well as to many chemicals. Polyurethane O-rings perform well at low temperatures, but are not recommended for high temperature or superheated steam. T..
What are the key differences between polyester urethane (AU) and polyether urethane (EU) O-rings?
The primary difference between polyester urethane (AU) and polyether urethane (EU) O-rings lies in their resistance to environmental conditions. AU type O-rings provide exceptional resistance to oil, fuel, and solvents, but they are prone to hydrolysis, which can affect their performance in moist environments. In contrast, EU type O-rings are not susceptible to hydrolysis, making them suitable for applications where moisture is present, while still offering comparable oil and fuel resistance to low ACN nitriles or HNBRs.
What applications are best suited for polyurethane O-rings?
Polyurethane O-rings are ideal for a variety of applications due to their excellent wear resistance, high tensile strength, and elasticity. They are commonly used in automotive, aerospace, and industrial machinery applications where resistance to oils, fuels, and various solvents is critical. Their durability makes them suitable for dynamic sealing applications as well.
How do the wear resistance and elasticity of polyurethane O-rings compare to other elastomers?
Polyurethane O-rings exhibit superior wear resistance and elasticity compared to many other elastomers. This makes them a preferred choice in high-stress applications where longevity and performance are paramount. Their high tensile strength allows them to maintain their integrity under pressure, which can be a limitation in other materials.