NBR X-Rings Buna-N Quad Ring Seals for Hydraulic Systems
NBR X-Rings, also known as Buna-N Quad Rings or X-Ring Seals, are premium sealing solutions engineered for demanding dynamic applications. Manufactured from high-quality Nitrile Butadiene Rubber (NBR), these advanced quad ring seals deliver superior performance compared to traditional O-rings, making them the preferred choice for hydraulic and pneumatic systems.
Key Features and Material Advantages
Crafted from premium NBR rubber, these X-rings offer excellent resistance to petroleum-based oils, gasoline, diesel fuel, and hydraulic fluids. They maintain reliable sealing performance across a wide temperature range from -40°F to 257°F (-40°C to 125°C). The unique X-shaped cross-section provides four sealing surfaces, significantly reducing the risk of twisting, rolling, and extrusion under pressure — common issues with standard round O-rings.
Why Choose NBR X-Rings Over Traditional O-Rings?
Unlike conventional O-rings, NBR X-rings create a more stable and tighter seal in reciprocating and rotating applications. Their design minimizes friction and wear, resulting in longer service life and fewer maintenance requirements. This makes them ideal for NBR X-ring for hydraulic cylinders, high-pressure pneumatic tools, and heavy-duty industrial equipment.
Technical Specifications
| Category | Item | Product Details (Fill in here) | Remarks & Buyer Focus |
| Basic Information | Product Name |
|
Keywords: NBR X-Rings / Nitrile Rubber X Rings / X Type O Rings |
| Model Number | ID x Thickness (Cross Section) | X-Rings | |
| Material | NBR (Nitrile Rubber) | 100% Virgin High Quality Nitrile Rubber Raw Material | |
| Color | Black / Custom color | Pantone color customization available | |
| Size & Dimension | Product Size | IDxC/S (Thickness) | All dimensions in millimeter (mm) |
| Tolerance | ID x C/S (Cross Section) | All dimensions in millimeter (mm) | |
| Unit Weight | This is based on which one you book | Standard: ±0.1mm / Precision: ±0.05mm | |
| Core Performance | Hardness | 88 Shore A | For shipping and packaging cost calculation |
| Tensile Strength | 12.0~18.0 MPa | Good durability and anti-break performance | |
| Temperature Resistance | Shore A 88 | Key parameter for nitrile rubber sealing products | |
| Waterproof Grade | Tensile Strength: 12.0~18.0 MPa | Excellent durability and anti-break performance for dynamic sealing | |
| Wear & Aging Resistance | NBR Min -40°F ~ 257°F (-40℃ ~ 125℃) | Suitable for normal to high temperature working environments | |
| Working Condition | Working Environment | IP Rating: IP67 | For electronic, outdoor, hydraulic and industrial sealing usage |
| Application | High wear-resistant / Ozone resistant / Weather resistant | Long service life for dynamic mechanical and outdoor applications | |
| Order & MOQ | MOQ (Minimum Order Quantity) | Stock item: Any quantity is acceptable Custom item different MOQ: 100pcs |
Stock item / Custom item different MOQ |
| Monthly Capacity | Normal temperature / High temperature / Oil / Water / Hydraulic fluid / Pneumatic system / Outdoor | Clear application working conditions for accurate selection | |
| Sample Service | Hydraulic systems, pneumatic tools, automotive industry, machinery equipment, plumbing, outdoor equipment, industrial sealing, etc. | Industry matching for B2B bulk buyers | |
| Production & Custom | Production Process | Compression molding | Professional manufacturing technology |
| Custom Service | Stock items: No MOQ limit, any quantity acceptable Custom items: 100pcs minimum |
Stock & custom items with different MOQ requirements | |
| Surface Treatment | 5,000,000 pcs | Stable factory production capacity for bulk orders | |
| Certification & Quality | Certification | ROHS / REACH / LFGB | Meet European & North American import standards |
| Quality Control | 100% full inspection before shipment | Strict quality assurance system | |
| Packing & Shipment | Packaging | Compression Molding | Professional manufacturing technology for precision sealing products |
| Lead Time | Custom size, custom color, custom hardness, custom logo, custom shape | Full OEM & ODM support for customized sealing solutions | |
| Payment Terms | Smooth finish / Matte finish / Silk screen printing / Laser engraving | Multiple surface treatment options available |
Main Applications
These seals are widely used across multiple industries:
● Automotive and truck manufacturing (fuel systems, transmissions, hydraulic brakes)
● Industrial hydraulic cylinders and pneumatic actuators
● Oil and gas equipment for pipe connections and valves
● Agricultural machinery and construction equipment
● Workshop tools including air compressors and hydraulic lifts
Installation and Usage Tips
Proper groove design is essential for optimal performance. We recommend using a 15-20% compression rate for dynamic applications. Always ensure the sealing surface is clean and properly lubricated with compatible grease before installation.
NBR X-rings are the reliable sealing solution that helps manufacturers reduce downtime, prevent leaks, and improve overall equipment efficiency. Whether you need oil resistant quad ring seals or high pressure Buna-N X-rings, our products are manufactured to strict quality standards to meet your exact requirements.