Pressed rings of expanded graphite

Pressed rings of expanded graphite

Moulded from an expanded graphite foil of 98% C purity level (industrial grade purity) or 99.85% C p. level (nuclear grade purity).

Availability on request.

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Moulded graphite rings are produced from an expanded graphite foil of 98% C purity (industrial grade purity) or 99.85% C purity (nuclear grade purity).

  • High temperature resistance between -200 °C and +650 °C
  • Maximum working pressure up to 500 bar
  • Excellent chemical resistance - pH 1 - 14 (except strong oxidizing agents)
Available variants:
  • Density 1.3 - 1.7 g /cm3
  • Graphite purity 98 % and 99.85 %
  • Square or rectangular cross section
  • Split and one-piece
  • Corners shrouding of stainless steel
  • Variations with different taper angles (standard 30° or 45°)
Wide range of dimensions and specific weights according to customer requirements.
Moulded and preformed rings are mainly used as spindle seals for medium pressure and high pressure fittings. The moulded rings are also used to seal the fittings by means of a pressure seal in a pressure-tight lid.

Packing rings generally available on out market are usually of markedly variable properties.
  • The most important properties to consider include the internal structure, homogeneity, density, ring elasticity and graphite purity.

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