Symmetrical Seal XSPRS07

Function:
Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

Features:

  • Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  • Increased preload due to an additional O-Ring.
  • Excellent static and dynamic sealing performance.
  • Excellent performance in low pressure conditions.
  • Used for short pulsating strokes.
  • No reverse leakage when changing direction.
  • Recommended for positioning or holding under pressure.

  • Reciprocating pistons/rods in hydraulic cylinders, plungers etc.
  • Switching or clamping functions.
  • Replacement for rubber fabric seals.
  • Max. pressure 400 bar, max. speed 0.5 m/s for all HPU types.
  • Max. pressure 400 bar, max. speed 0.7 m/s for HPU94 GM.
  • Max. pressure 160 bar, max. speed 0.5 m/s for all elastomer types.

Tolerances [mm]   
L < 10 mm
+ 0,2  
L ≥ 10 mm
+ 0,3  
∅ NA (rod groove)
H 10  
∅ NI (rod diam.)
f 8  
∅ NA (cylinder diam.)
H 9  
∅ NI (piston groove)
h 10  
 
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.