Piston Seal XSPS02A

Function:
Piston seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

Features:
  • Asymmetrical, single acting piston seal, designed with interference on the ID which provides a good static fit in the groove.
  • Dynamic sealing lip shorter than static lip to avoid drag pressure.
  • Excellent static and dynamic sealing performance.
  • Useable for long stroke lengths.
  • Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.
  • For lower speeds the dynamic lip should be redesigned (shorter, stiffer).
  • Activated back-up rings prevent and reduce gap extrusion.

Application

  • Reciprocating pistons in hydraulic cylinders, plungers.
  • Universal piston seal for small extrusion gaps and minor load impacts.
  • Max. pressure 700 bar, max. speed 0.5 m/s.

Seal housing recommandation

Tolerances[mm]  
L < 10 mm
+ 0,2 
L ≥ 10 mm
+ 0,3 
∅ NA
H9 
∅ NI
h10 
 
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.