Pure Expanded Graphite Gasket

At Kriloha Ltd., we recognize that in the world of industrial sealing, flexible graphite is the “wonder material” that solved the post-asbestos crisis. Our Kriloha Pure Expanded Graphite Gasket represents the absolute pinnacle of carbon-based sealing technology. As the premier global supplier of rubber seals and gaskets, Kriloha Gaskets has refined the exfoliation process to produce a material that is as versatile as it is durable.

Pure expanded graphite is created by treating high-quality natural flake graphite with an intercalating agent, followed by rapid exposure to heat. This causes the graphite flakes to expand or “exfoliate” into a vermiform (worm-like) shape, increasing their volume by hundreds of times. These expanded particles are then mechanically compressed into a flexible foil or sheet without the use of any binders or resins. Because Kriloha uses Zero-Binder Technology, our gaskets do not suffer from the brittleness or “bake-on” issues associated with lower-quality graphite products.

The primary engineering advantage of a Kriloha Expanded Graphite Gasket is its “active” sealability. Because it is highly compressible, it flows into the micro-imperfections of a flange face to create a gas-tight barrier at very low seating stresses. This makes it an excellent choice for older equipment where flanges may be slightly warped or pitted. Furthermore, expanded graphite is unique because it remains flexible at cryogenic temperatures while also being inherently fire-safe. In the event of a facility fire, a Kriloha graphite seal will not melt or support combustion, providing critical containment during emergency shutdowns.

As a top-tier supplier, Kriloha Ltd. ensures that our pure expanded graphite is treated to resist oxidation. While standard graphite begins to oxidize at 450°C, our specialized Kriloha-Shield™ processing can extend the service life in high-heat applications by creating a sacrificial barrier against atmospheric oxygen. Whether you are managing high-pressure superheated steam or volatile chemical reagents, specify Kriloha Gaskets to ensure your facility benefits from the highest purity, lowest emission, and most thermally stable graphite seals on the market. Our commitment to quality means every gasket is batch-tested for carbon purity and compressibility, ensuring “first-time-right” installation for every joint.

Primary Use Cases

High-Pressure Steam Service: The industry standard for power plant steam headers, turbines, and high-heat boiler systems.
Corrosive Chemical Handling: Sealing aggressive acids, alkalis, and solvents across the pharmaceutical and petrochemical sectors.
Hydrocarbon Processing: Ideal for refineries where fire-safety and volatile organic compound (VOC) containment are priorities.
Cryogenic Fluid Sealing: Reliable performance in liquid nitrogen, oxygen, and LNG transport systems.
Heat Exchangers and Pressure Vessels: Providing a high-recovery seal for large-diameter equipment subject to thermal cycling.

FAQs

Is “Pure” graphite better than reinforced graphite?

“Pure” expanded graphite offers the best chemical resistance and conformability. However, for high-pressure piping or large-diameter flanges, we often recommend our reinforced versions (with SS316 foil or tanged inserts) to provide extra structural handling strength.

Can I use a Pure Expanded Graphite Gasket on glass-lined flanges?

Yes. Due to its high compressibility and low seating stress requirements, it is one of the safest materials for fragile glass-lined or plastic equipment.

Will this gasket stick to my flange faces over time?

No. One of the greatest benefits of pure graphite is its naturally anti-stick property. Even after years of high-temperature service, the gasket can be removed cleanly, saving hours of maintenance labor.

What is the maximum pressure rating for this product?

When properly seated in a standard raised-face flange, pure expanded graphite can handle pressures up to 140 bar (approx. 2000 psi). For higher pressures, a spiral wound or kammprofile design is recommended.

How does Kriloha ensure the purity of its graphite?

We conduct rigorous laboratory testing on every raw material batch. Our standard pure grade is 98% carbon, while our Nuclear and High-Purity grades exceed 99.5% to ensure no contamination of the process media.