O-Ring 684x10 NBR

Applications

The O-Ring 684x10 NBR 70 ShA is a large-diameter rubber gasket engineered for demanding industrial sealing tasks, especially where robust static seal performance is needed. It is ideally suited for sealing large housings, flanges, tanks, reservoirs, pressure vessels, pipeline joints, machine casings, and other large components requiring leak-free closure. It serves well in hydraulic systems, pneumatic units, fluid storage tanks, filtration systems, industrial machinery, and processing plants.

As a standard rubber seal, this O-Ring fits applications in hydraulics, pneumatics, fluid transport, storage and containment, as well as environments with oil, grease, or typical industrial fluids. Its significant size makes it particularly useful when standard small seals cannot ensure adequate sealing for large components.

Advantages & Key Features

• High chemical and oil resistance - Made of NBR (nitrile rubber), this seal withstands oils, lubricants, hydraulic fluids, fuels, and many industrial chemicals, making it suitable for heavy-duty industrial and maintenance use.

• Large diameter and robust cross-section - With an inner diameter of 684 mm and cross-section of 10 mm, this O-Ring provides stable and secure sealing over extensive joints, flanges, covers, and housings.

• Reliable static sealing performance - The geometry supports consistent compression and retention, ensuring tight sealing in static or low-movement assemblies, even under moderate pressure or fluid presence.

• Durability and longevity - Thanks to NBR material with 70 ShA hardness, the gasket resists wear, compression set, aging, and mechanical stress, which translates into long operational life and lower maintenance costs.

• Flexible industrial compatibility - Suitable for hydraulics, pneumatics, fluid reservoirs, tanks, industrial machinery, filtration units, pumps, and industrial equipment requiring chemical- and oil-resistant sealing solutions.

• Ease of installation and maintenance - Simple cross-sectional shape facilitates quick installation, inspection, and replacement, making maintenance efficient in production or service settings.

Technical Data

• Inner Diameter (ID): 684 mm

• Cross-section (thickness): 10 mm

• Material: NBR (nitrile rubber)

• Hardness: 70 ShA

• Seal Type: Static / semi-static rubber sealing ring (O-Ring / rubber gasket / sealing ring)

• Typical Applications: Hydraulic and pneumatic systems, tanks, flanges, machine housings, industrial equipment, fluid reservoirs

Product Description

The O-Ring 684x10 NBR 70 ShA is a high-performance rubber gasket crafted for industrial-grade sealing requirements. Constructed from premium nitrile rubber, it offers excellent resistance to oils, fuels, lubricants, hydraulic fluids, and many common industrial media, making it suitable for hydraulic and pneumatic applications, fluid storage, and heavy machinery sealing tasks.

With its substantial dimensions — 684 mm inner diameter and 10 mm cross-section — this sealing ring is optimized for large housings, flanges, tanks, pressure vessels, machinery casing, and pipeline joints. Its design ensures a tight, reliable static seal, compensating for surface irregularities and providing long-term leak prevention in stationary or near-stationary assemblies.

The combination of NBR material and 70 ShA hardness gives this O-Ring a balanced characteristic: sufficient flexibility for proper sealing and enough rigidity to resist deformation, compression set or aging. This makes it a dependable solution for maintenance departments, OEM manufacturing, infrastructure installations, and industrial plants where durability and consistent sealing are mandatory.

This sealing ring is particularly effective in demanding environments: fluid handling systems, hydraulic units, pneumatic assemblies, storage tanks, filtration devices, and any equipment requiring a robust industrial sealing solution. Its versatility and reliability make it an excellent choice for buyers seeking long-lasting and cost-effective sealing components.

FAQ - Frequently Asked Questions

What media is this O-Ring 684x10 NBR 70 ShA suitable for?
It is suitable for sealing oils, lubricants, hydraulic fluids, fuels, water, and many standard industrial fluids that are compatible with nitrile rubber.

Is this O-Ring good for dynamic (rotating) parts?
No. This seal is designed for static or semi-static sealing (e.g. housings, tanks, flanges). For rotating shafts or high-dynamic applications, a dedicated dynamic seal would be more appropriate.

How to choose the right O-Ring size for my application?
Ensure the inner diameter matches the component’s internal dimension or housing bore. The 10 mm cross-section should fit the groove depth or sealing gap. Verify material compatibility with the medium being sealed.

Will the O-Ring remain effective over time under industrial conditions?
Yes. The 70 ShA hardness of NBR ensures resistance to aging, compression set, wear, and mechanical stress, ensuring long-term reliability in static sealing scenarios.