XR - X-rings

Product group: X-rings 


X-rings are four lipped seals with especially developed sealing profile. They are characterized by their annular form with a fourlipped profile. Their dimensions are specified with the inside diameter and the cross-section

Standard material


The choice of a suitable material is determined by the temperature, pressure and media.


Depending on material: different liquids, gases and chemicals.


X-rings are self energizing double-acting sealing elements. The forces acting in radial or axial direction due to the installation give them its initial squeeze. 

Area of applications

X-rings can be used for a wide range of different applications. They are used predominantly for dynamic sealing functions. 

Dynamic applications 

For sealing of reciprocating pistons, rods, plungers 
For sealing oscillating or rotating movements

Static applications

As a radial-static seal
As an axial-static seal
As an energizer element for elastomer energized hydraulic seals

Operational application limits

Working pressure, dynamic application

up to 5 MPa ( 50 bar) without Back-up Ring
up to 30 MPa (300 bar) with Back-up Ring

up to 15 MPa (150 bar) with Back-up Ring

Working pressure, static application
up to 5 MPa (50 bar) without Back-up Ring
up to 40 MPa (400 bar) with Back-up Ring

Reciprocating: up to 0.5 m/s
Rotating: briefly up to 2.0 m/s

Operating temperature range
NBR: -30°C to + 100°C
FKM: - 18°C to + 200°C