Frustrated by frequent seal failures or leaks in your system? Choosing the right type of sealing ring—X-ring or O-ring—can significantly improve performance and lifespan.
X-rings (also known as quad rings) offer better sealing, reduced friction, and longer wear life compared to O-rings, especially in dynamic applications.
Let’s explore how X-rings compare with O-rings and which is better for your specific application.
What Is an X-Ring?
Heard of X-rings but not sure what makes them different?
An X-ring is a four-lobed elastomer seal designed to reduce friction, improve sealing, and eliminate twisting compared to standard O-rings.
X-rings (quad rings)1 have a symmetrical cross-section shaped like an "X" or "+", which allows them to:
- Reduce rolling or twisting in dynamic grooves
- Provide multiple sealing contact points2
- Distribute pressure more evenly
- Improve lubrication retention3 in the groove
This makes them suitable for reciprocating, rotating, or high-pressure sealing environments.
What Is an X-Ring Used For?
Wondering where X-rings outperform O-rings?
X-rings are commonly used in hydraulic cylinders, pneumatic valves, rotating shafts, and dynamic sealing systems where stability and durability are critical.
🛠️ Typical Applications:
| Application Type | Why X-Ring Is Preferred |
|---|---|
| Reciprocating Pistons4 | Less friction, no twisting |
| Rotating Shafts | Multiple sealing lines |
| High Pressure Valves5 | Better stability under pressure |
| Lubricated Systems | Holds oil film between lobes |
| Hydraulic Seals6 | Extended lifespan, smoother motion |
X-Ring vs O-Ring: Which Is Better?
Still trying to decide between the two?
X-rings provide better performance than O-rings in dynamic or high-pressure systems, but O-rings remain more cost-effective for static or general-purpose sealing.
| Feature | O-Ring | X-Ring (Quad Ring) |
|---|---|---|
| Cost | 💲 Lower | 💲💲 Slightly Higher |
| Sealing Surface | Single line | Dual (redundant) lines |
| Twisting Resistance | ❌ Can twist | ✅ Stable geometry |
| Friction | ⚠️ Higher | ✅ Lower friction |
| Lubrication Retention | ❌ Minimal | ✅ Excellent |
| Best For | Static sealing | Dynamic applications |
Use O-rings for low-cost, static applications. Choose X-rings when sealing motion or high pressure.
Conclusion
X-rings outperform O-rings in dynamic sealing due to their anti-twist profile and multiple sealing surfaces. While O-rings remain popular for their low cost and simplicity, X-rings are the better choice for demanding industrial and hydraulic systems.
🧩 Need help choosing between X-rings and O-rings for your system?
Contact Julong Rubber or Request a Quote for custom-sized seals in NBR, Viton, EPDM, or silicone.
Or reach out via WhatsApp:
Explore the advantages of X-rings in various sealing environments and understand their unique benefits. ↩
Learn how multiple sealing contact points improve efficiency and reliability in sealing applications. ↩
Discover the significance of lubrication retention for optimal performance and longevity in seals. ↩
Explore how X-Rings reduce friction and enhance performance in reciprocating pistons, making them a superior choice for various applications. ↩
Discover the benefits of X-Rings in high pressure valves, including improved stability and reliability under extreme conditions. ↩
Learn about the extended lifespan and smoother motion provided by X-Rings in hydraulic seals, crucial for efficient operation. ↩
