Piston Seal XSPS81C

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

Features:
  • Symmetrical, double acting piston seal, designed with two define sealing edges on the profile ring tolower the friction.
  • High pressure force because of a machined rubber preload element.
  • Less relative movement of the rubber part compared to an O-Ring giving the seal a higher wear resistance.
  • Excellent sealing performance also in low pressure range.
  • Suitable for positioning functions.
  • Almost no tendency to “stick-slip” effect, good sliding properties.
  • Low break-away load after long standstills.
  • Excellent gap extrusion resistance.
  • Can be used in grooves where no O-Ring is possible.

Application

  • Reciprocating pistons in hydraulic cylinders, plungers in heavy-duty applications where now PTFE Compound is needed.
  • Max. pressure 400 bar, max. speed 10 m/s.

Seal housing recommendation

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.