Piston Seal XSPS08D

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-Rings on the ID and slight interference of the PTFE glide ring on the OD.
  • Quad ring® on the outside diameter ensures additional sealing especially at holding and positioning functions.
  • The use of two O-Rings ensures better pressure distribution on the sealing edges.
  • Good sealing function at medium separation.
  • Negligible tendency to “stick-slip” effect, good sliding properties.
  • Low break-away load after long standstills.
  • Excellent gap extrusion resistance.

Application

  • Reciprocating pistons in hydraulic cylinders, plungers.
  • Dynamic seals in hydraulic systems.
  • Max. pressure 400 bar, max. speed 3 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.

Attention: PTFE glide rings needs calibration after installation!