SIGRAFLEX® Sealing Materials for Power Plants

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The quality of sealing materials used in power plants play an essential role. Material failure will cost the operator time, money and maybe even reputation. Especially when it comes to resistance at very high or low temperatures as well as in the case of / under extreme temperature changes the materials on the market there are significant difference between the materials available on the market.

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gasket material

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For SIGRAFLEX high-purity graphite foil production we solely use high-purity natural graphite flakes as base material. This minimizes contamination which significantly reduces the leakage rate as well as the thermal and corrosion resistance of graphite gaskets on steel flanges. Using SIGRAFLEX foils allows for increasing the operating reliability and the entire service life of the equipment. Our products contribute significantly to cutting costs in static and dynamic sealing connections, no matter if they are used as packing or sealing material. Both SIGRAFLEX Z and ZX foil are free of PFAS.

Our SIGRAFLEX Z foil has an ash content below 0.15 %, a chloride and fluoride content of maximum 10 ppm and a sulfur content below 300 ppm. Therefore, it is especially suited to extreme requirements, such as sensitive processes in power plants.

In acute cases of corrosion of any kind, especially in the case of pitting-like corrosion, the use of SIGRAFLEX Foil ZX is recommended. The material is also advisable for packings, flat gaskets and shaped gaskets for armatures which are under the influence of water or steam.

SIGRAFLEX ZX foil is produced from SIGRAFLEX Z foil by subsequent treating the foil in several process steps with barium molybdate, a highly-effective corrosion inhibitor.

SIGRAFLEX Foil ZX is suitable for usage in nuclear power plants (primary and secondary circuit) with regards to safety and maintenance freedom.

Technical data sheets:

SIGRAFLEX Flexible graphite foil for industrial sealing

SIGRAFLEX Foil ZX

SIGRAFLEX^® Graphite rayon yarns

SGL Carbon’s high temperature stable and soft continuous filament SIGRAFLEX graphite rayon yarns are suitable for compliant packings for diverse applications. Among those are power generation including nuclear power generation, military applications, petrochemical and refinery processes, and pulp and paper mills.

SIGRAFLEX Continuous filament graphite rayon yarns

SIGRAFLEX HOCHDRUCK Sealing Sheet and Gaskets

SIGRAFLEX^® HOCHDRUCK and HOCHDRUCK PRO

SIGRAFLEX HOCHDRUCK allows end users in power plants including nuclear power plants, the chemical and petrochemical industries and refineries to cover almost their entire flat gasket requirements with a highly reliable and safe product.

SIGRAFLEX^® Z Foil Yarn

SIGRAFLEX Z foil yarn is based on high-purity flexible graphite SIGRAFLEX Z foil maintaining the excellent characteristics of the base material.

Our SIGRAFLEX materials made from expanded flexible graphite and our SIGRAFLEX yarns have proven their long-term stability in packings and gaskets under extreme operating conditions over the course of many years – especially when used in power plants.