O-ring 85x2,5 NBR

O-Ring 85x2,5 NBR 70 ShA - Professional Technical Sealing

The O-Ring 85x2,5 NBR 70 ShA is a precision-engineered rubber sealing ring designed for demanding industrial environments. The 85x2,5 dimension refers to an inner diameter of 85 mm and a 2,5 mm cross section, ensuring proper fit in standard groove designs used in housings, covers and flange connections. This O-Ring is primarily used as a static seal and can also perform in light dynamic applications with limited movement.

Manufactured from Nitrile Butadiene Rubber (NBR) with a hardness of 70 ShA, this technical seal provides high resistance to oils, greases and fuels commonly used in industrial systems. The material combines flexibility with mechanical strength, ensuring reliable sealing performance and extended service life under continuous operation.

Applications in Hydraulic and Industrial Systems

The O-Ring 85x2,5 NBR 70 ShA is widely applied in hydraulic and pneumatic systems as well as in general industrial machinery. Typical uses include:

• rubber gasket in pumps and valves

• sealing ring in hydraulic cylinders

• technical seal in machine housings

• maintenance component in industrial equipment

Thanks to the high oil resistance of NBR 70 ShA, this O-Ring supports stable sealing performance in systems operating with mineral oils and lubricants.

Technical Properties and Material Performance

NBR 70 ShA is one of the most commonly specified elastomers for industrial sealing applications. The O-Ring 85x2,5 offers:

• high resistance to oils, greases and fuels

• good abrasion resistance

• dimensional stability under compression

• reliable static sealing in industrial assemblies

The balanced 70 ShA hardness ensures the right combination of elasticity and durability, reducing the risk of leakage and premature wear.

FAQ - Frequently Asked Questions

1. What is the O-Ring 85x2,5 NBR 70 ShA used for?
It is used for static and light dynamic sealing in hydraulic, pneumatic and industrial machinery applications.

2. Is NBR 70 ShA resistant to oils and fuels?
Yes, NBR provides high resistance to mineral oils, greases and many petroleum-based fluids.

3. What is the typical operating temperature range?
Standard NBR 70 ShA O-Rings typically operate between approximately -30 C and +120 C, depending on working conditions.

4. Can this O-Ring be used in hydraulic systems?
Yes, it is commonly used in hydraulic and pneumatic sealing applications.

5. How do I select the correct O-Ring size?
Verify the inner diameter, cross section and operating parameters such as pressure, temperature and media compatibility.