Back-up Ring XSBUR12

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:
  • Triangular Anti Extrusion Ring for Rod applications
  • Special housing designs required.
  • Reduced gap extrusion of the elastomer seal and/or higher pressures up to 700 bar possible.
  • Available as split and non-split version.

Application

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

Seal housing recommandation

Tolerances[mm]  
L < 10 mm
+ 0,2 
L ≥ 10 mm
+ 0,3 
∅ NA
H10 
∅ NI
f8 
 
Surface roughnessRtmax [ µ] Ra [ µ] 
Bottom of groove
≤ 6,3≤ 1,6
Face of groove
≤ 15≤ 3
 
Sliding surfaceRtmax [ µ] Ra [ µ] 
PU, elastormeres
≤ 2,5≤ 0,1 - 0,5
PTFE
≤ 2≤ 0,05 - 0,3

Installation

Snap-in installation.