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Plastics & rubber
NBR 90SHA Rubber K Ring Seal Suppliers Industrial Gasket Factory in China
High-performance NBR 90SHA Rubber K Rings from a leading China factory. ISO 9001 certified suppliers offering abrasion and oil resistant seals for automotive and industrial use. Factory direct sale with OEM custom moulding services available.
SupplierShijiazhuang Beike Sealing Technology Co.,Ltd.www.beikesealing.com
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About this product
Product information from the supplier.
The NBR 90SHA Rubber K Ring is a high-performance sealing solution engineered from Nitrile Butadiene Rubber (Buna-N), specifically designed for industrial applications requiring superior resistance to oils, fuels, and hydraulic fluids. With a high hardness of 90 Shore A, these K-profile seals provide exceptional mechanical strength and structural integrity, ensuring a leak-proof barrier in demanding environments such as fuel tanks, grease boxes, and hydraulic systems.
Combining excellent abrasion resistance with a robust compression set, our NBR K Rings are manufactured under strict quality control protocols, including optical sorting and raw material inspection. Whether you require standard sizes or custom OEM specifications, these seals offer a reliable, long-term solution for sealing gasoline, water, and silicone oil, balancing durability with precise engineering to reduce downtime and maintenance costs.
Detailed Parameters
| Material | NBR (Nitrile / Buna N) | Hardness Range | 50-90 Shore A (Standard: 90SHA) |
|---|---|---|---|
| Temperature (Low) | -30°F to -40°F | Temperature (High) | Up to 250°F |
| Tensile Strength | 200-3000 P.S.I | Elongation (Max) | 600% |
| Oil Resistance | Good to Excellent | Abrasion Resistance | Excellent |
| Solvent Resistance | Good to Excellent | Chemical Profile | Butadiene Acrylonitrile |
Key Advantages
Oil & Fluid Resistance
Superior resistance to hydraulic fluids, gasoline, and oils, preventing seal degradation in harsh chemical environments.
Extended Service Life
Excellent abrasion and tear resistance ensures the seals maintain their shape and function over long operational cycles.
Precision Fit
Advanced mold inspection and optical sorting guarantee 100% qualified dimensions for every cavity and batch.
Optimal Compression
Good compression set and rebound properties ensure a consistent, tight seal even under varying pressure loads.
Strict Quality Control
Multi-stage inspection from raw material testing to final optical sorting ensures zero-defect delivery.
Flexible OEM Support
Over 6 years of OEM experience with access to 25,000+ existing molds for rapid prototyping and production.
Product Gallery
Management Platforms
Material Inspection
Rigorous testing of all raw materials before storage with detailed property comparison reports.
Mold Validation
Full-size mold checking after development or cleaning to ensure consistency across every cavity.
In-Process Control
Continuous monitoring of semi-finished products to maintain the defective rate within strict limits.
Final QC Check
The Quality Department performs a comprehensive appearance and functional check for every batch.
Optical Sorting
Utilizing optical sorting machines to ensure 100% qualification in size and external appearance.
Logistical Efficiency
Strategic loading via Tianjin port with fast lead times ranging from 2 to 15 days based on stock.
Investment Return Comparison
| Evaluation Metric | Standard Rubber Seals | Our NBR 90SHA K-Rings |
|---|---|---|
| Seal Lifespan | Moderate | Extended (High Wear Resistance) |
| Oil Compatibility | Variable | Excellent (Buna-N Specialized) |
| Dimensional Accuracy | ± 0.2mm | High Precision (Optical Sorted) |
| Maintenance Cycle | Frequent Replacement | Reduced Downtime |
| Customization Speed | Slow Tooling | Fast (25k+ Mold Database) |
Frequently Asked Questions
Q: What are the primary applications for NBR Rubber K Rings?
NBR K Rings are primarily used in fuel tanks, grease boxes, hydraulic systems, and environments involving gasoline, water, or silicone oil where oil resistance is critical.
Q: Can NBR 90SHA seals be used with acetone or MEK?
No, NBR is not recommended for use with highly polar solvents such as acetone, MEK, ozone, or chlorinated hydrocarbons as they may degrade the material.
Q: How does the 90SHA hardness affect seal performance?
90 Shore A provides a harder, more rigid seal that offers better resistance to extrusion and higher mechanical strength compared to softer rubber compounds.
Q: What is the lead time for custom OEM rubber parts?
Sample lead time is typically 7 days, while mass production generally takes between 10 to 15 days depending on the mold requirements.
Q: Do you provide raw material certification?
Yes, we perform testing on all raw materials before storage and provide relevant reports to ensure material properties are stable and consistent.
Q: What information is needed for a quick quotation?
To receive an accurate quote, please provide: (1) Material, (2) Inner Diameter Cross Section (IDCS), (3) Hardness, (4) Color, and (5) Quantity.
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Shijiazhuang Beike Sealing Technology Co.,Ltd.
