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Nitrile rubber gaskets are renowned for their exceptional oil resistance, making them the preferred choice for industries where exposure to petroleum-based fluids is common. Constructed from a copolymer of acrylonitrile and butadiene, these gaskets offer a unique balance of elasticity, mechanical strength, and chemical stability. Our Buna-N/NBR gaskets are engineered to seal pipelines, flanges, and machinery components effectively, ensuring leak-free operations in demanding settings.
Our nitrile rubber gaskets are designed to meet rigorous technical standards, ensuring compatibility with diverse industrial applications. Below is a detailed breakdown of their specifications:
Parameter | Range |
Temperature Range | -20°C to 110°C (long-term use); 150°C in hot oil environments |
Pressure Rating | Up to 16 MPa |
Size Range | DN15 to DN400 (custom sizes available) |
Material Thickness | 1mm to 20mm |
Outer Diameter | 3mm to 300mm |
Hardness | 40–90 Shore A (customizable for specific applications) |
Note: Our gaskets are available in black (standard) and white (FDA-compliant grades upon request).
Nitrile rubber's molecular structure, rich in polar nitrile groups, provides superior resistance to petroleum-based oils, including lubricants, fuels, and hydraulic fluids. This makes our gaskets ideal for applications where contact with oils is frequent, such as automotive engines and industrial machinery.
Long-Term Resistance: Withstands continuous exposure to oils at 120°C.
Extreme Conditions: Maintains integrity in 150°C hot oil environments for short durations.
While highly resistant to oils, our NBR gaskets also perform well in weak acid and alkali environments. However, they are not recommended for use with strong oxidizing agents or polar solvents like ketones and esters.
pH Tolerance: Stable in solutions with pH levels between 4 and 10.
Abrasion Resistance: Durable against mechanical wear, ensuring longevity in high-friction applications.
Our gaskets are engineered to function across a broad temperature spectrum:
High-Temperature Performance: Retains flexibility and sealing power up to 110°C (long-term) and 150°C (short-term).
Cold Resistance: Operates reliably at temperatures as low as -20°C, making them suitable for cold climates.
Nitrile rubber's robust polymer chains resist degradation from oxidation and UV exposure, ensuring a long service life. However, prolonged exposure to high-temperature oils or strong oxidizers may cause gradual hardening.
Nitrile rubber gaskets are versatile and widely used across industries that demand reliable sealing solutions. Below are their primary applications:
Engine Seals: Critical for sealing oil pans, transmission systems, and fuel lines to prevent leaks.
Fuel Systems: Resistant to gasoline, diesel, and biofuels, ensuring safe operation in modern vehicles.
Suspension Components: Used in bushings and mounts to dampen vibrations and resist oil contamination.
Hydraulic Systems: Seals pumps, valves, and cylinders exposed to hydraulic oils and lubricants.
Chemical Processing: Ideal for equipment handling petroleum derivatives, such as refineries and petrochemical plants.
Pneumatic Tools: Provides airtight seals in compressors and pneumatic actuators.
Oil-Contaminated Water Systems: Seals pipe joints in drinking water equipment with grease or oil traces.
Industrial Piping: Resists corrosion and leaks in pipelines transporting oils, solvents, and chemicals.
FDA-Compliant Grades: Our white nitrile gaskets meet FDA 21 CFR 177.2600 standards, ensuring safe use in food processing and packaging.
Fuel Systems: Reliable sealing in aircraft engines and military vehicles exposed to jet fuels and hydraulic fluids.
Precision Manufacturing: State-of-the-art tooling and CNC machining ensure tight tolerances and consistent quality.
Customization: From size to hardness, we tailor gaskets to your exact specifications.
Fast Turnaround: Competitive lead times and responsive customer service.
Request a Quote Today to experience the reliability of our Buna-N/NBR gaskets for your next project.
For reference, here's how our nitrile rubber gaskets stack up against other materials:
Material | Temperature Range | Pressure Rating | Key Advantages |
FKM (Fluorocarbon) | -20°C to 200°C | 16 MPa | High-temperature resistance |
EPDM | -57°C to 176°C | <2.5 MPa | Excellent weather and ozone resistance |
Natural Rubber | -50°C to 80°C | 16 MPa | Cost-effective for low-stress applications |
Chloroprene (CR) | -20°C to 100°C | 16 MPa | Flame resistance and weather ability |
Nitrile rubber stands out for its oil resistance and balanced performance across temperature and pressure ranges, making it the go-to choice for oil-intensive environments.
Contact Lixu Rubber today to discuss your gasket requirements. Our team of experts is ready to provide tailored solutions that meet your technical and budgetary needs.
| Test Item | Test Condition | Standards | Test result | |
| Test under normal situation | Hardness(Shore-A) | room temperature | 70±5 | 71 |
| Tensile strength(Mpa) | ≥10 | 14 | ||
| Elongation (%) | ≥250 | 305 | ||
| Density(g/cm3) | / | 1.215 | ||
| Aging-Resistance Testing | Hardness Change(Shore-A) | 100℃×70 h | ≤+15 | 5 |
| Tensile strength Change(%) | ≤-20 | 4 | ||
| Elongation Change(%) | ≤－40 | -21.5 | ||
| Compression set | Compression Set(%) | 100℃×22 h | ≤25 | 8.1 |
| Oil-Resistance No.1 OIL | Hardness Change(Shore-A) | 100℃×70 h | ≤-5~+10 | 8 |
| Tensile strength Change(%) | ≤-25 | 9 | ||
| Elongation Change(%) | ≤-45 | -9.7 | ||
| Volume Change(%) | -10~+5 | -9.5 | ||
| Oil-Resistance N0.3 OIL | Hardness Change(Shore-A) | 100℃×70 h | -10~+5 | -1 |
| Tensile strength Change(%) | ≤-45 | 6.6 | ||
| Elongation Change(%) | ≤-45 | -2.3 | ||
| Volume Change(%) | 0~+25 | 5.3 | ||
| Water Resistance | Hardness Change(Shore-A) | 100℃×70 h | ±10 | -2 |
| Volume Change(%) | ±15 | 3.6 | ||
| Fluid Resistance Fuel A | Hardness Change(Shore-A) | 23℃×70 h | ±10 | 0 |
| Tensile strength Change(%) | ≤-25 | -9.2 | ||
| Elongation Change(%) | ≤-25 | -8.8 | ||
| Volume Change(%) | -5~+10 | 0.9 | ||
| Fluid Resistance Fuel B | Hardness Change(Shore-A) | 23℃×70 h | 0~-30 | -9 |
| Tensile strength Change(%) | ≤-60 | -31.1 | ||
| Elongation Change(%) | ≤-60 | -32.2 | ||
| Volume Change(%) | 0~+40 | 17 | ||
