Piston Seal XSPS04A

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.

    • Application

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