NBR 70 rubber O-rings and colored HNBR nitrile rubber seals are among the most widely used sealing solutions in modern industries. Known for their excellent oil resistance, durability, and adaptability, these rubber rings are essential in automotive, hydraulic, and industrial applications. With customizable sizes, hardness, and colors, they provide reliable performance under a wide range of operating conditions.

Our factory specializes in producing high-quality nitrile O-rings that meet international standards. Whether you need custom rubber rings for specific machinery or colored HNBR O-rings for easy identification, we can provide tailored solutions to match your requirements.

What Are NBR 70 O-Rings?

NBR, also known as nitrile butadiene rubber, is a synthetic elastomer that offers outstanding resistance to petroleum-based oils and fuels. The “70” refers to the Shore A hardness rating, which provides an excellent balance between flexibility and durability. This makes NBR 70 O-rings a preferred choice for sealing applications that demand both strength and resilience.

Key benefits of NBR 70 O-rings:

• Resistance to oils, fuels, and hydraulic fluids

• Good abrasion and wear resistance

• Reliable performance across a wide temperature range

• Cost-effective and versatile sealing solution

What Are HNBR Colored O-Rings?

Hydrogenated Nitrile Butadiene Rubber (HNBR) is a premium elastomer derived from NBR through a hydrogenation process. This modification improves its resistance to heat, chemicals, and oxidation, making HNBR O-rings suitable for high-performance and long-lasting sealing.

Colored HNBR O-rings are widely used in industries where quick identification of seals is important. Colors such as green, blue, red, or yellow help distinguish between different sizes, materials, or applications.

Advantages of HNBR O-rings:

• Higher temperature resistance than standard NBR

• Excellent resistance to chemicals and oils

• Improved mechanical properties and longevity

• Available in multiple colors for easy identification

Key Features of Our Custom Rubber O-Rings

• Material Options: NBR 70 Shore, HNBR, EPDM, FKM, and more

• Custom Colors: Black, green, red, blue, yellow, or as per request

• Flexible Sizing: Standard and non-standard dimensions available

• Durable Design: Resistant to oil, fuel, hydraulic fluids, and wear

• Temperature Range: NBR (-40°C to +120°C), HNBR (-40°C to +150°C)

Applications

Our NBR 70 and HNBR O-rings are used in a wide variety of industries:

• Automotive Industry: Engine components, fuel systems, air conditioning seals

• Hydraulic and Pneumatic Systems: Cylinders, pumps, and valves

• Industrial Equipment: Compressors, gearboxes, and heavy machinery

• Oil & Gas Industry: Sealing solutions for pipes, fittings, and drilling equipment

• General Engineering: Custom gaskets and washers for mechanical assemblies

Advantages of Choosing Our Rubber Seals

✔ Long-lasting durability – resistant to oil, abrasion, and chemicals
✔ Wide customization options – hardness, color, and size flexibility
✔ Cost-effective solution – suitable for both OEM and aftermarket needs
✔ Reliable performance – prevents leaks and improves equipment efficiency
✔ International standards compliance – ensures high-quality sealing solutions