Piston Seal XSPS35A

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

Features:
  • Symmetrical, double acting compact piston seal, designed with interference on the ID which provides a good static fit in the groove.
  • Excellent static and dynamic sealing performance.
  • Excellent performance in low pressure conditions.
  • For rotary applications the interference on the ID has to be increased (better static fit to reduce the danger of the seal rotating in the housing), the preload has to be reduced (lower friction).
  • State-of-the-art design of XSPS35.

Application

  • Reciprocating pistons in hydraulic cylinders, plungers.
  • Static and dynamic seals in hydraulic systems, replacement for O-Rings (no twisting or pumping), alternative design for composite piston seals (PTFE + O-Ring energizer).
  • Depending on material: max. pressure 400 bar, max. speed 0.4 m/s.

Seal housing recommendation

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.