The UNS hydraulic piston and rod seal is a U-shaped sealing ring designed for both piston and rod applications in hydraulic cylinders . Made from high-quality polyurethane (PU) material, this seal provides excellent wear resistance and stable sealing performance. It is suitable for medium and high pressure hydraulic systems used in excavators, loaders, and other engineering machinery.
SANPING SEAL – Engineering Machinery High-End Seals – 17 Years Export Expertise
Product Overview
The UNS seal is a U-shaped hydraulic seal that can be used for both piston sealing and rod sealing applications. It features an asymmetric lip design with equal inner and outer lip heights, making it versatile for various hydraulic cylinder installations . The seal is easy to install and provides reliable sealing performance under normal working conditions.
Specifications and Parameters：
Minimum order: 10 sets
| Parameter |
Detail |
| Product Name |
UNS Hydraulic Piston and Rod Seal |
| Material |
PU (Polyurethane) |
| Hardness |
90-95 Shore A |
| Color |
Blue, Green, Light Yellow |
| Working Pressure |
≤ 31.5 MPa |
| Temperature Range |
-35°C to +100°C |
| Working Speed |
≤ 0.5 m/s |
| Medium |
Hydraulic oil (mineral oil-based) |
| Application |
Piston seal and rod seal for hydraulic cylinders |
Product Features
1. Dual Application
The UNS seal can be used for both piston and rod sealing due to its equal lip height design . This makes it a versatile choice for hydraulic cylinder repair and maintenance.
2. High-Quality PU Material
Made from high-performance polyurethane (PU) material, the seal offers excellent abrasion resistance and good tensile strength . PU combines the resilience of rubber with the toughness of plastic.
3. Wear Resistance
The material provides outstanding resistance to wear and tear, ensuring a long service life even in demanding working conditions.
4. Good Sealing Performance
The U-shaped lip design provides reliable sealing under normal working pressures, effectively preventing hydraulic fluid leakage.
5. Easy Installation
The seal is designed for easy fit into standard hydraulic cylinder grooves, saving time during installation and replacement.
6. Wide Temperature Range
With an operating range from -35°C to +100°C, the UNS seal performs reliably in various climate conditions.
Applications
● Excavator hydraulic cylinders
● Loader hydraulic cylinders
● Bulldozer hydraulic systems
● Other engineering machinery hydraulic cylinders
● Industrial hydraulic equipment
Available Sizes
UNS seals are available in a wide range of standard sizes, for example:
● 80×90×8, 80×90×9, 80×90×10
● 80×95×8, 80×95×9, 80×95×10
● 90×100×6, 90×100×8, 90×100×10
● Custom sizes available upon request
Why Choose SANPING SEAL?
17 Years of Export Expertise
Guangzhou Sanping Machinery Co., Ltd., established in 2009, has served customers across South Asia, Southeast Asia, Africa, South America, the Middle East, and Europe.
Specialized Focus
We concentrate exclusively on engineering machinery high-end seals, ensuring we understand your equipment applications better than general seal suppliers.
Quality Guarantee
Every order follows our two-step quality process: pre-production sample testing before mass production, and final inspection before shipment.
Frequently Asked Questions (FAQ)
Q: What is the difference between UN and UNS seals?
A: UNS is a type of U-cup hydraulic seal suitable for both piston and rod applications. It features a wide cross-section and equal lip heights .
Q: What material is used for UNS seals?
A: UNS seals are made from high-grade polyurethane (PU) material with a hardness of 90-95 Shore A.
Q: What color options are available?
A: We offer UNS seals in blue, green, and light yellow.
Q: What is the working pressure range?
A: The maximum working pressure is 31.5 MPa.
Q: What is the temperature range?
A: The seal can operate from -35°C to +100°C.
Q: What are your payment terms?
A: We accept T/T (bank transfer), L/C, MoneyGram, Western Union, and cash.
