Products Description
NBR O-Rings (Nitrile Butadiene Rubber O-Rings) are one of the most widely used sealing solutions in the world, known for their excellent resistance to oils, fuels, and many petroleum-based fluids. With strong mechanical properties, good compression resistance, and cost-effective performance, NBR remains the preferred elastomer for automotive, hydraulic, and general industrial applications.
NBR Material Description
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：
|
Product Name |
Tensile Strength (MPa) |
Elongation (%) |
Applicable Temperature (°C) |
Hardness (Shore A) |
|
NBR O-Ring |
16.9 |
100 ~ 300 |
-40 ~ 120 |
40 ~ 95 |
Quality Indicators：
|
Items |
NBR1704 |
NBR2707 |
NBR3604 |
NBR3606 |
N230S |
N240S |
|
Combined acrylonitrile content (%) |
17–20 |
27–30 |
36–40 |
36–40 |
33.5–36.5 |
24.5–27.5 |
|
Volatile content (%) ≤ |
1.0 |
1.0 |
1.0 |
1.0 |
0.75 |
0.75 |
|
Ash (%) ≤ |
1.5 |
1.5 |
1.5 |
1.5 |
- |
- |
|
Antioxidant D (%) ≥ |
1.0 |
1.0 |
1.0 |
1.0 |
- |
- |
|
Tensile strength (MPa) ≥ |
24.5 |
27.5 |
29.4 |
29.4 |
20.1 |
18.7 |
|
Permanent deformation (%) ≤ |
17 |
28 |
30 |
30 |
- |
- |
|
Swelling rate (%) ≤ |
70 |
38 |
20 |
20 |
- |
- |
Applications
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.
Products Advantages
Why Choose US ?
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
Focus on Quality
•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.
Packing & Delivery
|
MOQ |
1 pcs |
|
Lead Time |
- In stock: Shipped within 3 days |
|
Port |
China Xiamen |
|
Shipping Methods |
Express (DHL, FedEx, UPS), Air, or Sea |
|
Sample Policy |
Samples available; customer should pay freight cost |
Qualification Certificate
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
Hot Tags: O Ring NBR, China O Ring NBR suppliers, manufacturers, factory
