X-rings — also known as four-lobed rings or quad rings — have a cross-section with four sealing lips instead of the single round profile of a standard O-ring. This design provides two sealing points per side in both static and dynamic applications, reducing friction, spiral twisting, and extrusion compared to conventional O-rings, while often allowing reuse of the same groove design. Available in NBR, FKM, and EPDM, individually or in assorted kits.
Why Choose PM X-Rings / Four-Lobed Rings?
PM offers precision-engineered X-Rings designed to improve sealing efficiency, extend service life, and reduce maintenance costs. Our products are manufactured to international quality standards and are available in standard and custom sizes for a wide range of industrial applications.
Key Features of X-Rings / Four-Lobed Rings
- Four-Lobed Sealing Design - Provides four sealing contact points for enhanced sealing efficiency and improved leak prevention.
- Reduced Friction - Lower contact area minimizes friction, reducing wear and improving component performance.
- Anti-Twist Performance - The unique X-shaped profile prevents seal twisting and spiral failure during dynamic movement.
- Excellent Wear Resistance - Manufactured from high-performance elastomers for long-lasting durability in demanding applications.
- Superior Chemical Resistance - Compatible with hydraulic fluids, lubricants, oils, fuels, water, and many industrial chemicals.
- Wide Temperature Range - Maintains reliable sealing performance across a broad range of operating temperatures.
- Long Service Life - Designed to reduce maintenance frequency and extend the lifespan of equipment.
X-Rings / Four-Lobed Rings
Types
PM X-Rings, also known as Four-Lobed Rings or Quad Rings, are advanced sealing elements designed to provide superior sealing performance compared to conventional O-rings. Featuring a unique four-lobed profile, X-Rings reduce friction, minimize twisting during installation, and provide multiple sealing points for enhanced leak prevention. Manufactured from premium elastomers such as NBR, FKM (Viton®), EPDM, Silicone, HNBR, and PTFE compounds, PM X-Rings deliver exceptional performance in hydraulic, pneumatic, and rotary applications.
Looking for premium-quality X-Rings / Four-Lobed Rings for your hydraulic, pneumatic, or rotary sealing applications?
PM offers a complete range of standard and custom X-Rings manufactured from high-performance materials to ensure reliable sealing, reduced friction, and long service life. Our technical experts are ready to help you select the ideal X-Ring for your specific application.