Piston Seal XSPS08A

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

Features:
  • Asymmetrical, double acting piston seal, designed with interference of the O-Ring on the ID and slight interference of the glide ring on the OD.
  • Two external sealing edges working as a primary seal and reducing the risk of the blow-by effect.
  • Central back-up and sealing bulge.
  • Glide ring in very wear resistent hard grade polyurethane (PU-D57).
  • Suitable for positioning and holding functions.
  • Negligible tendency to “stick-slip” effect.
  • Low break-away load after long standstills.
  • Good gap extrusion resistance.

Application

  • Reciprocating pistons in hydraulic cylinders, plungers.
  • Dynamic seals in hydraulic systems.
  • Max. pressure 250 bar, max. speed 1 m/s.

Seal housing recommandation

Tolerances[mm]  
L < 10 mm
+ 0,2 
L ≥ 10 mm
+ 0,3 
∅ NA
H8 
∅ NI
h8 
 
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.