Statotherm R profile rings R901/B..

Statotherm R profile rings R901/B..

Statotherm R profile rings R901/B..

Statotherm R profile rings R901/B..


Statotherm R profile rings R901/B are made from permanently elastic, expanded graphite (purity ≥ 99.85%, ash content ≤0.15 %, chloride content ≤20 ppm) without binders or fillers. Statotherm R profile rings R901/B are almost maintenance-free and are intended for exposure to extreme temperature cycling and/ or high or low temperature ranges which cannot be withstood by elastomeric O-rings.


  • High purity nuclear grade graphite
  • Outstanding deformability
  • Permanent resiliency
  • Permanent elasticity
  • Good cross-sectional tightness

Operating range

Pressure: p = 500 bar
Sliding velocity
  • Pump application
    vg = 2 m/s
  • Continuous operation:
    t = -200 °C ... +500 °C
  • Steam: tmax+550°
Recommended surface roughness: RZ = 10 - 40 μm

Chemical resistance: pH = 0 … 14
Resistant to almost all organic and inorganic acids, alkalis, oils and solvents.

Standards and approvals

  • TA Luft
  • BAM (upon request)


R901/B5: density 1.3 g/cm3
R901/B6: density 1.4 g/cm3
R901/B7: density 1.6 g/cm3
R901/B8: density 1.8 g/cm3
R904/...: reduced sulphur content < 200 ppm


Statotherm profile rings must only be permitted to deform in the axial direction. The sealing groove must be designed to prevent tensile stresses causedby widening of the profile rings (which are damaged by radial deformation).

Forms of supply

  • All dimensions (minimum cross-section 3 mm) and profiles up to max. Ø 1,000 mm
  • Precompressed rings, closed, split or with slanted cut
  • Also available with protective cap (in 1.4541) on one side