Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
Industrial Hydraulic UP Piston Seal: Wear-Resistant Polyurethane (PU) Sealing Component
Prevents Fluid/Gas Leakage in Hydraulic Cylinders, Long Service Life with Anti-Extrusion Performance
A premium sealing solution engineered for reciprocating hydraulic cylinders, the UP Piston Seal stands out in industrial use with core advantages. Made of high-grade polyurethane (PU), it offers exceptional wear resistance, withstands pressures up to 40MPa, and stays stable at -40℃~+120℃, ensuring reliability in harsh conditions.
It features low compression set and anti-extrusion design to prevent fluid/gas leakage, and adapts to speeds up to 0.5m/s. Easy to install (no backup rings needed under 16MPa), it cuts maintenance costs and extends hydraulic system lifespan. Ideal for enhancing operational efficiency, this seal ensures long-term sealing integrity—your reliable choice for durable, high-performance hydraulic cylinder protection.
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1. Product Advantages
Developed by Forever Seals, the UP Piston Seal is built with high-quality polyurethane (PU) to deliver outstanding industrial performance. It boasts exceptional wear resistance, reducing the need for frequent replacements; handles pressures up to 40MPa and maintains stable operation between -40℃ and +120℃, making it suitable for harsh working environments. With low compression set, it ensures long-term sealing reliability, while its anti-extrusion design prevents fluid or gas leakage even at operating speeds of up to 0.5m/s. Additionally, no backup rings are required when pressure is below 16MPa, minimizing maintenance costs and improving overall operational efficiency.
2. Working Principle
The UP Seal adopts an asymmetric U-shaped lip structure, with a taller inner lip and a shorter outer lip. When installed in hydraulic cylinders, it creates a tight seal between the piston and the cylinder wall. As hydraulic pressure rises, the seal’s lip undergoes slight deformation, enhancing contact with the sealing surface to block leakage of fluids or gases. For added protection, select models are equipped with pressure-relief grooves that prevent damage caused by backpressure, ensuring the piston moves smoothly in reciprocating motion.
3. Product Details
Material: Premium thermoplastic polyurethane (TPU) or cast polyurethane (CPU), offered in green, blue, and natural color options
Structure: Single-acting U-shaped lip seal; some models feature anti-backpressure grooves for enhanced performance
Dimensional Compatibility: Fully customizable to match various hydraulic cylinder sizes, with Forever Seals supporting both standard and non-standard specifications
Installation Convenience: Lightweight construction allows for easy assembly, no specialized tools are needed
4. Application Range
The UP Piston Seal is ideal for reciprocating hydraulic cylinders across multiple industries, including:
Heavy machinery (e.g., excavators, wheel loaders)
Automotive manufacturing (e.g., hydraulic stamping presses)
Aerospace (e.g., hydraulic control systems for aircraft components)
Industrial equipment (e.g., injection molding machines, hydraulic lifting platforms)
5. FAQ
Q1: Is the UP Seal suitable for gas sealing applications?
A1: Absolutely. It provides effective sealing for both liquids and gases, meeting the demands of multi-medium sealing scenarios.
Q2: Under what circumstances is a backup ring required?
A2: When operating pressure exceeds 16MPa or there is a large gap between the piston and cylinder, we recommend using Forever Seals’ PTFE or nylon 1010 backup rings to prevent seal extrusion.
Q3: What is the expected service life of the UP Seal?
A3: Under standard operating conditions, its service life is 2 to 3 times longer than that of ordinary rubber seals, all thanks to the high-quality PU material used.
6. Forever Seals’ Selling Points
Quality Guarantee: Every UP Seal undergoes 100% pre-shipment testing for pressure resistance and temperature stability; production processes are ISO 9001 certified, ensuring consistent quality.
Customization Capability: Rapid response to non-standard size requests, with sample lead times as short as 7 to 10 days.
After-Sales Support: 24/7 technical consultation services are available; for quality-related issues, free replacements are provided within 1 year of purchase.
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