Piston Seal XSPS04

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.
  • Increased preload due to an additional O-Ring.
  • Activated back-up ring prevents and reduces gap extrusion.
  • Excellent static and dynamic sealing performance.
  • Excellent performance in all pressure ranges.
  • Used for short, pulsating strokes.
  • No reverse leakage when changing direction.
  • Recommended for positioning or holding under pressure.

  • Reciprocating pistons in hydraulic cylinders, plungers, push rods, fittings, etc.
  • Switching or clamping functions.
  • Max. pressure 700 bar, max. speed 0.5 m/s.

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