Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
J-Style Skeleton-Free Polyurethane Dust Seal
For Hydraulic Cylinders | Effective Dust & Particle Blocking | -35℃~+80℃ Operating Temperature
A high-performance sealing solution for hydraulic systems, designed to block dust, particles, and foreign contaminants—safeguarding reciprocating piston rods and extending equipment lifespan.
Crafted from durable polyurethane, it boasts 90±2A Shore hardness, excellent wear resistance, and low friction. Operating reliably across -35℃~+80℃, it’s compatible with hydraulic oil, emulsions, and air.
Its compact design fits space-constrained setups, with tool-free installation for convenience. Suitable for general machinery, valves, and heavy-duty engineering cylinders, it delivers consistent protection, reduces maintenance needs, and ensures smooth system operation—an essential choice for long-term equipment efficiency.
5.0
design customization
Please fill out the form below to request a quote or to request more information about us. Please be sure to upload customized requirement documents or pictures, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
1. Product Advantages
Superior Protection: Made of high-quality polyurethane (PU), the seal effectively blocks dust, particles, and foreign contaminants from entering hydraulic systems, preventing abrasion to reciprocating piston rods and reducing equipment failure risks.
Durable Performance: Features 90±2A Shore hardness for excellent wear resistance and low friction, ensuring long service life even in frequent motion scenarios.
Flexible Adaptability: Operates stably in a wide temperature range (-35℃~+80℃) and is compatible with hydraulic oil, emulsions, and air, fitting diverse working conditions.
Easy & Space-Saving: Compact cross-section design suits space-constrained installations; tool-free assembly saves time and labor costs for maintenance.
2. Working Principle
The J-style structure of the skeletonless seal creates a tight contact with the piston rod’s surface. When the rod reciprocates, the seal’s lip scrapes off external dust and debris in real time, while its elastic PU material maintains a reliable seal—preventing contaminants from penetrating the hydraulic cylinder and safeguarding internal components (e.g., seals, oil) from pollution.
3. Product Details
Material: Premium polyurethane (PU) (TPU for general machinery; CPU for heavy-duty engineering cylinders).
Standard Compliance: Meets JB/T6657-93 standards; groove design aligns with JB/T6656-93 for easy matching with common hydraulic parts.
Physical Traits: Lightweight, corrosion-resistant, and non-deformable under normal working pressure (≤31.5MPa).
4. Application Range
General machinery (e.g., conveyors, packaging machines).
Hydraulic valves and cylinders.
Heavy-duty engineering equipment (e.g., excavators, loaders) – ideal for harsh working environments with high dust levels.
5. FAQ
Q1: Can this seal be used with other media besides hydraulic oil?
A1: Yes, it is compatible with emulsions and compressed air, making it versatile for multiple system types.
Q2: How often should the seal be replaced?
A2: Under normal working conditions, it can last 12–24 months; replacement frequency may increase in dusty or high-load environments.
Q3: Does Forever Seals provide customized sizes?
A3: Yes, we offer tailor-made solutions based on your specific equipment dimensions and working requirements.
6. Forever Seals’ Selling Points
Quality Assurance: All seals undergo strict pressure and wear testing to meet international industry standards.
Fast Delivery: We maintain a large inventory for standard sizes, ensuring 3–5 day lead times for urgent orders.
Technical Support: Our professional team provides pre-sales consultation (e.g., seal selection) and after-sales troubleshooting to solve your problems efficiently.
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