O-ring 222x3,5 NBR

Applications & Typical Use Cases

The O-Ring 222x3.5 NBR 70 ShA is a versatile industrial rubber seal / O-Ring sized correctly for medium-to-large systems. With an inner diameter of 222 mm and a cross-section (thickness) of 3.5 mm, it is designed for use in hydraulic cylinders, pumps, valves, tanks, fluid reservoirs, bearing housings, gearboxes, and industrial fluid handling manifolds. This O-Ring suits both static sealing (e.g. flanges, covers, housings) and moderately dynamic applications (e.g. pistons, actuators), making it a flexible sealing solution in maintenance, retrofit and OEM production environments.

Material Properties & Performance Advantages

Manufactured from NBR (nitrile butadiene rubber) with a hardness of 70 Shore A, this O-Ring combines elasticity, chemical resistance and mechanical stability, making it a reliable rubber gasket for demanding industrial conditions. NBR is globally recognized for its excellent resistance to mineral oils, greases, hydraulic fluids, fuels, and many common industrial chemicals, while retaining elasticity across a typical working temperature range.

The 3.5 mm cross-section offers a balance between compact groove dimensions and effective sealing pressure, ensuring minimal squeeze needed for full sealing — an advantage where space constraints or tight tolerances occur. The 222 mm diameter provides compatibility with larger housings and ensures easy integration in standard machine assemblies and fluid systems.

Additionally, this O-Ring exhibits low compression set, high wear resistance, and stable sealing performance under repeated pressure cycles, vibration or thermal fluctuations, delivering long service life and reducing maintenance frequency — benefits highly valued in industrial and hydraulic installations.

Key Benefits for Industry Use

• Chemical & oil resistance: NBR 70 ShA resists mineral oils, hydraulic fluids, greases, fuels and many chemical media — ideal for hydraulic, pneumatic, fuel, oil and lubrication systems.

• Large diameter, compact profile: 222 mm ID with 3.5 mm cross-section — fits medium-large equipment while enabling installation in narrow grooves.

• Versatile industrial applications: pumps, valves, cylinders, tanks, gearboxes, bearing housings, fluid reservoirs — both static and dynamic sealing.

• Reliable and durable sealing performance: resistant to pressure fluctuations, vibration and cyclic loads — ensures long service intervals and lowers downtime.

• Cost-effective sealing solution for B2B procurement: standard size, widely available material, easy storage, and efficient replacement — ideal for maintenance, OEM production and bulk purchases.

FAQ

Is O-Ring 222x3.5 NBR 70 ShA suitable for hydraulic oil systems?
Yes — NBR material is highly resistant to hydraulic oils, greases and lubricants, making this O-Ring suitable for pumps, cylinders, valves or hydraulic circuits.

Can this O-Ring be used in pneumatic or air-handling systems?
Yes — for pneumatic pressures and conditions within standard NBR temperature and pressure ranges, it performs reliably as a static or low-dynamic seal.

Is the 3.5 mm cross-section enough to ensure tight sealing at 222 mm diameter?
Yes — provided the groove and gland design are correct, 3.5 mm cross-section combined with NBR’s elasticity ensures a solid seal with minimal extrusion risk in standard pressure ranges.

What is the typical temperature range for this O-Ring?
NBR 70 ShA generally remains flexible approximately from -30 °C up to about +100 °C (with occasional higher peaks depending on system conditions), making it effective for most industrial, hydraulic, and pneumatic applications.

In which applications does O-Ring 222x3.5 NBR 70 ShA perform best?
It performs best in hydraulic and pneumatic systems, oil-handling and lubrication equipment, industrial machinery, pump housings, valves, tanks, gearboxes — particularly where chemical exposure, oil resistance and reliable sealing are required.