X-rings

X-rings (Quad rings)

X-rings, also known as quad-rings, are double-acting four-lip seals with a cross-sectional profile of an X. The X-ring obtains its sealing function through installation and compression in an axial or radial installation chamber. The sealing function is enhanced by the medium pressure.

Fields of application

X-rings are similar to an O-ring. They serve, for example, as radial and axial seals of covers, bushings and flanges or as seals for piston and piston rod, rotating shafts and covered screw movements. X-rings are mainly used for dynamic applications, as they require less pretensioning than O-rings and therefore produce less friction. X-rings are also commonly used for static applications and for reciprocating movements.

Advantages X-ring:

• Optimal sealing function due to better pressure distribution

• X-rings require low radial preload, resulting in lower friction

• No adverse influence by fleece as the seal is positioned between the sealing lips

• Great stability in dynamic application, as the X-ring does not tend to roll in the groove