O-Ring 20x3 NBR 90 ShA

High-hardness NBR O-ring for hydraulic and pneumatic systems

Reliable technical sealing with high resistance

Application and properties of O-Ring 20x3 NBR 90 ShA

Main product description

The O-Ring 20x3 NBR 90 ShA is a precision rubber sealing ring designed for technical applications requiring reliable sealing under increased pressure and demanding operating conditions. In Poland, this product is commonly searched under phrases such as “O-Ring 20x3”, “NBR O-Ring 90 ShA”, “rubber seal 20x3” and “O-ring for hydraulics”, reflecting its widespread industrial use.

The NBR (nitrile rubber) compound provides excellent resistance to mineral oils, lubricants, fuels and many industrial fluids. The increased hardness of 90 ShA ensures higher resistance to deformation, extrusion and mechanical wear, making this O-ring suitable for applications where standard 70 ShA seals may be insufficient.

The O-Ring 20x3 NBR 90 ShA is used as a technical sealing element in hydraulic and pneumatic systems, industrial machinery, service equipment and mechanical assemblies. It performs reliably in both static and dynamic sealing applications, ensuring tightness, dimensional stability and long service life.

Thanks to its precise dimensions and homogeneous material structure, the O-ring provides consistent sealing performance and secure fit in standard grooves. It is widely selected by B2B customers, technical wholesalers and maintenance departments that require repeatable quality, high resistance and dependable operation in industrial environments.

FAQ - Frequently Asked Questions

What is the O-Ring 20x3 NBR 90 ShA used for?
It is used for sealing in hydraulic, pneumatic and industrial systems operating under higher pressure.

What is the difference between 90 ShA and 70 ShA O-rings?
A hardness of 90 ShA offers greater resistance to deformation and is better suited for high-pressure applications.

Which media is NBR resistant to?
NBR is resistant to mineral oils, greases, fuels and many technical fluids.

Can this O-ring be used for dynamic sealing?
Yes, it is suitable for both static and dynamic sealing applications.

What is the typical operating temperature range?
The standard operating range is approximately from -30°C to +100°C, depending on working conditions.