Graphite gasket plates, graphite gaskets

We offer graphite gaskets and graphite sealing plates.

Graphite sealing plates are designed for the most demanding industrial applications.
Due to their high temperature stability and high chemical resistance, they are used in applications where conventional fibre rubber plates (our range here) do not work.
Graphite seals are thus suitable for applications such as steam. More info here.

Graphite plates and graphite gaskets are available in several variants:
Graphite foil without insert
Graphite gasket plate with smooth stainless steel insert
Graphite gasket plate with spiked or perforated insert

By using an insert, the graphite gasket with insert achieves excellent pressure resistance even at high ambient temperature.

In addition to whole plates, we also supply graphite seals to order.
We use CNC plotter cutting technology or waterjet cutting to process the material (more details here)

Graphite seals are produced according to standardized standards according to DIN, CSN, ANSI but also as atypical dimensions and shapes according to customer’s drawing documentation.

Graphite gasket plates for graphite gaskets offered by us:

Sigraflex Economy

Reinforced graphite sealing plate with stainless steel plate insert.

Usage:

  • As a flat seal for pumps and valves, especially for tiny sealing thicknesses.
  • For gas farms and off-shore technology.
  • For flat seals according to DIN2690 for flanges with smooth sealing strip, for low operating pressures up to 25 bar and medium specific pressures σBO up to 60 N/mm2. If the seals are subjected to low temperatures during operation, the σBO may be higher.
  • For corrosive media, but limited by the stainless steel foil and adhesive layer.

Features:

  • With stainless steel tipped plate insert, very easy to handle.
  • Soft, pliable.
  • Slight permeability to gases and liquids, even at low specific pressures.
  • Applicable from the lowest temperatures up to over 500 °C depending on operating and installation conditions:
    • in an inert environment up to approx. 500 °C
    • Steam tested up to approx. 550 °C
    • in air and oxidizing media from approx. 400 °C – contact us for more information
  • Good resistance to chemicals
  • Asbestos-free, health-safe
  • Resistant to aging and embrittlement, free of binders
  • Long-term stable compressibility and cushioning over a wide temperature range.
  • No measurable cold or hot flows occur at the recommended specific pressures
  • Thin adhesive layer ≤ 10 μm, chloride-poor.

Sigraflex Standard

Sealing plate made of impregnated graphite.

Usage:

  • As a flat seal according to DIN 2690 for flanges with smooth sealing strips. Recommended up to DN350
  • For large segment seals from DN 1000. Also for ring shaft sleeves.
  • For medium operating pressures up to 40 bar and for higher specific pressures up to 100 N/mm2
  • For enamels and glass, especially for portholes.
  • For highly corrosive media such as HCI, it has excellent chemical resistance.
  • For emergency repairs and complicated shapes.

Vlastnosti:

  • Not susceptible to scratches
  • Low permeability to gases and liquids
  • Applicable from the lowest temperatures up to approx. 500 oC depending on the required service life, installation and operating conditions.
    • in an inert environment up to approx. 3000 oC
    • steamed up to approx. 500 oC
    • in air from approx. 400 oC consultation required
  • Excellent resistance to chemicals
  • Asbestos-free, health-safe
  • Resistant to aging and embrittlement, free of binders
  • Long-term stable compression and cushioning over a wide temperature range.
  • No measurable heat fluxes occur at the recommended specific pressure values
  • Very good resistance to temperature changes
  • Good pressure resistance
  • Easily processed by cutting and pressing
  • Can compensate for larger unevenness of sealing surfaces

Sigraflex Universal

Sealing plate made of impregnated graphite. Fire safe test to BS 6755

Basic description:

  • As a flat seal according to DIN 2690 for flanges with smooth sealing strips. It is recommended as a one-piece. Over DN900 double layer in segments.
  • Preferably for flanges with tongue and groove according to DIN 2691. Up to DN 900 a one-piece arrangement is recommended, from DN 1000 onwards a two-layer segmented arrangement.
  • For high operating pressures up to 100 bar and for high specific pressures up to 140 N/mm2
  • For blowout-proof, securely sealing and highly stressed sealing joints, in stainless steel inner lining.
  • For piping with corrosive media at high temperatures. Heat transfer oil media and thermal equipment. For old equipment, tanks and steam pipes. For exhaust manifolds.
  • Very good chemical resistance therefore for corrosive media. Restriction by stainless steel plate insert.

Certificates and attestations:

  • Fire safe test to BS 6755

Main features:

  • With stainless steel tipped plate insert, very easy to handle.
  • Low gas permeability, impermeable to liquids.
  • Low diffusion quantity, high security against blowing out and high mechanical strength when sealed with stainless steel inner lining.
  • Not susceptible to scratches, slight adhesion to other materials.
  • Applicable from the lowest temperatures up to 500°C depending on operating and installation conditions:
  • in an inert environment up to approx. 800°C (limitation depending on the type of metal insert)
  • steamed up to approx. 500°C
  • in air from approx. 400°C – contact us for more information
  • Good resistance to chemicals
  • Good strength against transverse shear
  • Asbestos-free, health-safe
  • Resistant to aging and embrittlement, free of binders
  • Long-term stable compressibility and cushioning over a wide temperature range.
  • No measurable cold or hot flows occur at the recommended specific pressures
  • Good temperature behaviour