Symmetrical Seal XSPRS19

Function:
Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

Features:
  • Symmetrical, single acting seal, no interference on the ID or OD.
  • For use as rod or piston seal
  • Preload effected through V-spring which ensures the continious pressure on the sealing lips.
  • Retainer nose on inside and outside lip.
  • Excellent static and dynamic sealing performance.
  • Excellent sealing performance in low and high pressure ranges.
  • Useable for short and long stroke lengths.
  • Low friction in dry running or poor lubrication conditions.
  • Negligible tendency to “stick-slip” effect, small break away loads.

Application

  • Reciprocating and swivelling pistons in hydraulic cylinders, plungers.
  • Chemical and pharmaceutical industry, aggressive fluids and high temp.
  • Max. dyn. pressure 450 bar, max. speed 1 m/s.

Seal housing recommandation

Tolerances [mm]  
L < 10 mm
+ 0,2 
L ≥ 10 mm
+ 0,3 
∅ NA (rod groove)
H 10 
∅ NI (rod diam.)
f 8 
∅ NA (cylinder diam.)
H 9 
∅ NI (piston groove)
h 10 
 
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

Installation in open housing, snap-in installation possible in special designed housings.

We recommend to maintain a nominal width/seal height ration (CS/NH) above 1/1,5.