Rubber NBR O Ring

The Customized NBR Rubber O-Ring from Best Seal is a high-performance sealing component designed for demanding industrial and automotive applications. Made from premium Nitrile Butadiene Rubber (NBR), it provides excellent resistance to oils, fuels, lubricants, and many common chemicals, making it one of the most widely used materials for dynamic and static sealing.

Our NBR O-Rings are manufactured with precision molding technology and strict quality control under ISO 9001, CE, UL, FDA, NSF, WRAS, RoHS, REACH, and SGS certifications. With a hardness range of 20–90 Shore A and operating temperature from -40°C to +120°C, they deliver reliable sealing performance even under pressure, vibration, and temperature fluctuations.

We offer both standard AS568 sizes and fully customized dimensions, ensuring a perfect fit for any sealing application. The color, hardness, and formulation can all be customized to meet specific design or functional requirements. Our production capacity of 5 million pieces per day guarantees fast delivery and consistent quality for both small and large-scale orders.

NBR O-Ring is a sealing ring made from Nitrile Butadiene Rubber (NBR), a copolymer of acrylonitrile and butadiene. It is typically produced through low-temperature emulsion polymerization, resulting in excellent oil resistance, abrasion resistance, heat resistance, and strong adhesion to various materials.

NBR is one of the most widely used oil-resistant elastomers in the sealing industry. The acrylonitrile content in NBR usually varies between 18% and 50%, which directly affects its oil and cold resistance properties.

The higher the acrylonitrile content, the better the oil resistance; however, the cold resistance decreases accordingly. Conversely, lower acrylonitrile content improves flexibility and low-temperature performance.

Owing to its unique balance of mechanical strength and chemical stability, NBR has become an essential sealing material in the automotive, hydraulic, pneumatic, petroleum, and industrial machinery fields.

Common trade names of NBR include Breon® (BP Chemicals), Chemigum® (Goodyear), Hycar® (B.F. Goodrich), Krynac® (Polysar Ltd.), Nipol® (Zeon Chemicals), Paracril® (Uniroyal Chemical), and Perbunan® (Mobay).

Technical Properties of NBR O-Ring：

Quality Indicators：

NBR O-Rings possess excellent oil resistance, good air tightness, and strong adhesion properties, making them suitable for various industries. They are widely used in the production of oil-resistant seals, gaskets, sleeves, hoses, and flexible packaging.

Typical applications include:

Because of its durability and cost-effectiveness, NBR O-Ring has become an indispensable sealing component in modern engineering.

1. Long Service Life

The combination of high elasticity and chemical resistance ensures stable performance and minimal degradation over time, significantly extending equipment life.

2. Superior Sealing Effect

Even under high pressure and extreme temperature changes, Viton O-rings maintain tight sealing, effectively preventing leakage and reducing maintenance costs.

3. Environmentally Friendly Production

All materials comply with RoHS and REACH standards, ensuring environmental safety during use.

1.10,000+ Molds Available – Extensive mold library to meet diverse size and material requirements.

2.No MOQ, Starts from One Piece – Flexible customization from sample testing to bulk production.

3. In-Stock Inventory - Standard sizes in stock, ensuring quick shipment, Fast Global Delivery

•Precise inspection, zero-defect quality, ensuring both delivery time and quality.

•Meets the 125/1008H high-temperature aging test requirements of the new energy industry;

•Withstands commercial cleaner (Alcohols, Alkalis, Oils) test requirements.

Contact US：

Xiamen Best Seal Imp and Exp Co.,Ltd

Tel: +86-592-5782315

Mob: +8618950159396

Email: yunying2@bestsealhk.com

Add: Unit 522-525, Gaodian Road 6#, Huli District, Xiamen, China

Why choose us?

• With years of experience, we are confident in our ability to meet your Solid O-ring requirements.
• Our company implements the strategy of strengthening talents and hopes to build a team of excellent and professional talents.
• We have a skilled team of professionals who produce Solid O-ring products to the highest standards.
• Our products and services are all based on meeting the needs of customers.
• Our Solid O-ring products are designed to provide maximum sealing efficiency in industrial settings.
• Over the years, the company's Rubber NBR O Ring equipment has been widely praised by users, and customer satisfaction has been increasing year by year.
• We work closely with our clients to deliver Solid O-ring products that meet their specific needs.
• We promote the overall coordination and progress of the company's development, benefit more customers, and strive to create a new space for harmonious development.
• Our Solid O-ring products are used in a variety of industries, including automotive, aerospace, and industrial manufacturing.
• We have a first-class warehouse system and database to ensure on-time delivery.

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