O-ring 218x3,5 NBR 90 ShA

High hardness O-ring for demanding industrial applications

Reliable sealing for hydraulics and pneumatics

High resistance to oil, pressure and mechanical stress

Technical Specification and Application

The O-ring 218x3,5 NBR 90 ShA is a precision-engineered technical sealing ring designed for high-pressure and mechanically demanding environments. With an inner diameter of 218 mm and a cross-section of 3,5 mm, it provides secure sealing performance in static and semi-dynamic applications.

Manufactured from NBR (nitrile rubber) with a hardness of 90 ShA, this sealing element offers increased resistance to extrusion, deformation, and compression under load. Compared to standard 70 ShA compounds, 90 ShA O-rings are particularly suitable for higher pressure systems where dimensional stability and structural rigidity are critical.

This O-ring functions as a reliable rubber gasket in hydraulic units, pneumatic systems, pumps, valves, cylinders, and industrial housings. As a typical sealing ring used in professional engineering environments, it ensures tight sealing and consistent performance in applications exposed to mineral oils, greases, fuels, and industrial fluids.

NBR material provides good resistance to petroleum-based oils and lubricants, as well as stable performance in a temperature range typically from -30°C to +100°C, depending on operating conditions. Its balanced elasticity and mechanical strength make it a dependable solution for demanding industrial applications.

The O-ring 218x3,5 NBR 90 ShA is recommended for maintenance departments, machine manufacturers, and technical wholesalers seeking durable sealing solutions for high-pressure hydraulic and pneumatic systems.

Key Features

• Type: O-ring / sealing ring

• Dimensions: 218x3,5 mm

• Material: NBR (nitrile rubber)

• Hardness: 90 ShA

• High pressure and extrusion resistance

• Suitable for hydraulic and pneumatic sealing systems

FAQ

What material is the O-ring 218x3,5 made from?
It is made from NBR, a nitrile rubber compound resistant to oils and fuels.

Why choose 90 ShA hardness?
Higher hardness improves resistance to extrusion and deformation under high pressure.

Where can this O-ring be used?
In hydraulic systems, pneumatic equipment, pumps, cylinders, and industrial machinery.

What is the temperature range for NBR?
Typically from around -30°C to +100°C, depending on operating conditions.