Static Seals

X-ring

For static and dynamic applications, its design prevents a twisting of the cord.

   

X-ring

A X-ring is a double-action sealing element for either static or dynamic applications and has an x-shaped profile with four sealing lips.

  • radial - dynamic applications
  • axial/radial - static applications

Due to the large variety of elastomeric compounds, virtually all solvent and gaseous media can be applicable. The advantage of this sealing cross section is that the parting line of the tool lies outside of the sealing area. Furthermore, a lubricant reservoir can build up in between the sealing lips and this development is of great benefit during dynamic applications.
X-rings are installed using similar groove dimensions as those of standard O-rings and are available in a variety of common elastomer materials. The most common of these are NBR, HNBR, FKM, EPDM, CR, VMQ and FVMQ.
Dimensions are available according to AS 568 (inch sizes). 

fields of application
static
dynamic
single-acting
double-acting
linear
rotatory
oscillating
materials
elastomers
technical data
material NBR
pressure static up to 40 MPa (from 5 MPa with Back-up ring)
linear up to 30 MPa (from 5 MPa with Back-up ring)
rotatory to 15 MPa (from 5 MPa with Back-up ring)
temperature -30°C / +80°C (material dependent)
speed up to 2 m/s
material HNBR
pressure static up to 40 MPa (from 5 MPa with Back-up ring)
linear up to 30 MPa (from 5 MPa with Back-up ring)
rotatory up to 15 MPa (from 5 MPa with Back-up ring)
temperature -30°C / +150°C (material dependent)
speed up to 2 m/s
material FKM
pressure statisch up to 40 MPa (from 5 MPa with Back-up ring)
linear up to 30 MPa (from 5 MPa with Back-up ring)
rotatory up to 15 MPa (from 5 MPa with Back-up ring)
temperature -20°C / +200°C (material dependent)
speed up to 2 m/s
material EPDM
pressure static up to 40 MPa (from 5 MPa with Back-up ring)
linear up to 30 MPa (from 5 MPa with Back-up ring)
rotatory up to 15 MPa (from 5 MPa with Back-up ring)
temperature -40°C / 130°C (material dependent)
speed up to 2 m/s
Maximum values temperature, speed and pressure are simultaneously not applicable! The values vary in dependence of material and media. For technical queries please contact our application consultants – we have the right solution for you. 
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Technical topics - special designs

Do you have any questions, ideas or suggestions?

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Mr. Andreas Raidt
+49 (0) 7034 2518 - 240

ara(a)ulman.de

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