Back-up Ring XSBUR11

Function:
Back-up rings or Anti Extrusion Rings do not have a sealing function. They are designed to prevent elastic sealing elements of gap extrusion.

Features:

  • Active Anti Extrusion Ring for Rod Seal XSRS02
  • Reduced gap extrusion of the elastomer seal and/or higher pressures up to 700 bar possible
  • Prevention of twisting of the seal in the groove.
  • Available as split non-split version.

  • Dynamic and static applications in reciprocating pistons and rods in hydraulic cylinders, plungers, etc.
  • Unfavourable tolerances and wide gap dimensions.

Tolerances [mm]   
L < 10 mm
+ 0,2  
L ≥ 10 mm
+ 0,3  
∅ NA
H8  
∅ NI
f8  
 
Surface roughness Rtmax [ µ]  Ra [ µ] 
Bottom of groove
≤ 6,3 ≤ 1,6
Face of groove
≤ 15 ≤ 3
 
Sliding surface Rtmax [ µ]  Ra [ µ] 
PU, elastormeres
≤ 2,5 ≤ 0,1 - 0,5
PTFE
≤ 2 ≤ 0,05 - 0,3

Snap-in installation.