Rod U cup seal
XHH Seals offers a high-performance Rod U-Cup Seal engineered for superior sealing in moderate to high-pressure hydraulic applications. Featuring an advanced asymmetrical lip design, this dynamic seal maintains optimal contact pressure to ensure long-lasting performance and zero-leak reliability. Manufactured from high-quality materials and available in standard or custom diameters (6 mm to 2 meters), our rod seals are ideal for both OEM use and hydraulic cylinder repair.
Key Features
High pressure resistance up to 400 bar (6000 psi)
Wide operating temperature range
Excellent resistance to abrasion and extrusion
Compatible with a wide variety of hydraulic fluids
Asymmetrical design ensures efficient and consistent sealing
Simple and secure installation
Custom sizes and materials are available
Applications
Trusted by industry professionals, XHH Seals' U-cup seals are suitable for:
Hydraulic cylinders (manufacture and repair)
Mobile hydraulic systems
Agricultural and construction machinery
Hydraulic presses and injection molding machines
Mining and industrial hydraulic systems
Material Options
We provide versatile rod seal materials tailored for your application’s temperature, pressure, and fluid media:
| Material | Temperature Range | Fluid Compatibility | |
|---|---|---|---|
| Machined Polyurethane (H-PU) | -20°C to +115°C | Hydraulic oils, emulsions, water-glycol | |
| Injection Molded TPU | -30°C to +110°C | Oils, water-based fluids | |
| Nitrile Rubber (NBR) | -30°C to +100°C | General hydraulic oils | |
| Hydrogenated NBR (HNBR) | -30°C to +150°C | High-temp, chemically resistant | |
| EPDM | -45°C to +130°C | Water, glycol, steam | |
| FKM (Viton® Equivalent) | -20°C to +200°C | Aggressive fluids, high temperatures |
Need something special? XHH Seals offers custom formulations upon request.
Technical Specifications
Pressure rating: Up to 400 bar (6000 psi)
Speed: Up to 0.5 m/s
Installation: Suitable for dynamic rod sealing
Surface Finish Recommendations:
Rod surface: ≤0.3 µm Ra
Groove ID: ≤1.8 µm Ra
Groove sides: ≤3.0 µm Ra
Seal Design and Dimensions
Offered in both metric and inch series
Multiple cross-sectional profiles for diverse system requirements
Engineered extrusion gap tolerances for optimized performance
Custom machining for special groove dimensions available
“Need additional protection from contaminants? Check out our Double-Lipped Rod U-Cup Seal for even greater sealing performance.”
Why Choose Us as Your Rod Seal Manufacturer?
We are a professional rod seal manufacturer with a focus on quality, performance, and customization. Whether you need standard urethane rod seals or special blends for extreme conditions, we deliver export-ready solutions trusted by global partners. From OEM customers to industrial MRO clients, we offer fast response, technical support, and reliable sealing performance.
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