O-Ring 7.5x2 NBR

Applications of the O-Ring 7.5x2 NBR 70 ShA

The O-Ring 7.5x2 NBR 70 ShA is used as a reliable sealing element in static and dynamic applications across hydraulic, pneumatic, and mechanical systems. It provides a secure seal against oils, fuels, lubricants, compressed air, and various industrial fluids. Common applications include valves, pumps, cylinders, quick couplings, pipe fittings, compressors, dosing devices, machine tools, and maintenance service tasks in industrial and automotive environments.

Key Advantages and Performance Characteristics

Manufactured from high-quality nitrile rubber (NBR), this sealing ring offers excellent durability and performance in demanding operating conditions. The 70 ShA hardness ensures optimal flexibility and pressure retention, while the material’s chemical resistance allows long-term reliability in contact with mineral oils and greases. The O-Ring maintains dimensional stability within a wide temperature range, providing consistent sealing without deformation or premature wear.

Technical Specification

• Internal Diameter (ID): 7.5 mm

• Cross-Section: 2 mm

• Material: NBR (Nitrile Rubber)

• Hardness: 70 ShA

• Package: 100 pieces

• Properties: Oil-resistant, fuel-resistant, suitable for hydraulic and pneumatic systems

Main Description

This O-Ring 7.5x2 NBR 70 ShA is an industrial-grade sealing component designed to ensure leak-free operation in both static and dynamic installations. Its nitrile rubber composition provides high resistance to oils, fuels, greases, and common industrial lubricants, making it suitable for a wide variety of hydraulic and pneumatic applications. With a 70 ShA medium hardness rating, the ring maintains a balance between flexibility and mechanical strength, enabling reliable sealing under varying pressure conditions.

The precise dimensional tolerance of the 7.5 mm inner diameter and 2 mm cross-section ensures compatibility with standard grooves and housings in industrial machinery. NBR material is widely recognized for its chemical stability and good aging resistance, offering extended operational life and reduced maintenance downtime.

Supplied in economical packs of 100 pieces, this product is ideal for OEM assembly lines, repair facilities, service workshops, and industrial maintenance departments that require consistent, repeatable sealing performance. It integrates seamlessly into engines, pumps, compressors, valves, fluid power components, and rotating equipment used across manufacturing, automotive, agricultural, marine, and automation sectors.

FAQ

1. What temperature range can NBR O-Rings operate within?
Typically −30°C to +100°C, depending on fluid exposure and system pressure.

2. Are NBR O-Rings resistant to oils and fuels?
Yes. NBR is specifically formulated to resist mineral oils, fuels, and many industrial lubricants.

3. Can this O-Ring be used in water applications?
Yes, but for hot water or steam environments, EPDM or FKM/Viton® may be more suitable.

4. How do I choose the correct O-Ring size?
Match the internal diameter and cross-section to the groove dimensions and sealing pressure requirements.

5. Is 70 ShA hardness suitable for dynamic systems?
Yes — 70 ShA is a common standard hardness for dynamic sealing in hydraulic/pneumatic components.