GraFoil® Flexible Graphite

GraFoil® material was first introduced in 1967 as the original flexible graphite technology. This graphite foil was quickly utilized as the first fluid sealing material made exclusively from pure, natural graphite flake. Its resistance to heat, fire, corrosion, and aggressive chemicals makes it the most universally applicable sealing solution in the market today. GraFoil flexible graphite has successfully been used in a wide array of applications across many industries including:

• Oil and gas
• Chemical plants
• Refining and petrochemical industries
• Automotive gasketing
• Nuclear and industrial gasketing
• Infrastructure
• Power generation
• Pharmaceuticals
• Battery systems

GraFoil flexible graphite is a distinctive material with all the essential characteristics of natural graphite: superior thermal stability, thermal conductivity, natural lubricity, and chemical resistance. GraFoil material provides a tight seal, even after repeated exposure to the harshest environments. The material is a preferred high temperature gasket material because it:

• Outperforms conventional elastomeric bonded gasket materials
• Is resistant to heat, has no water crystallization and is naturally lubricious
• Is chemically inert and is an excellent conductor of heat and electricity
• Acts as an effective sealing material
• Offers an ideal replacement for asbestos-based gaskets
• Is superior to other non-asbestos type sheet gaskets

Multiple product variations are offered to meet requirements of these key industries:

• Nuclear products
• Industrial products
• Automotive products

Specific product variations include:

• Rolls with a thickness range of 0.003″ to 0.060″ (0.08 to 1.5 mm), a typical width up to 39.4″ (1 m), and length ranging from 100 ft (30.48 m) to as long as 3,000 ft (914.4m), depending on customer weight and outside diameter limitations
• A typical density of 70 lb/ft3 (1.12 g/cc) with capability to customize to at least 20 lb/ft3 higher and lower
• Sheets with a typical thickness range of 0.032” to 0.125”, and typical length and width of 39.4” (1 m)
• Purity ranging from 95% C to as high as 99.999% C
• Service temperature of 840°F (450°C) despite extended periods of exposure to air, with an option to extend the service temperature to 975°F (525°C) with the addition of an oxidation inhibitor
• Service temperature as high as 5400°F (3000°C) in an inert environment

• Flexible, compactible, conformable and resilient
• Easily molded, cut, and formed for a wide variety of applications Provides better sealing performance over a wider range of chemical and temperature conditions
• More thermally stable and chemically inert with considerably less creep relaxation than elastomeric bonded gasket materials.
• Superior sealability under low flange loads
• High surface conformity
• Unlimited shelf life
• No sharp edges

NeoGraf has a long history in supporting the wide range of high temperature gasketing needs, leveraging an extensive product portfolio and a world-wide distribution network.

GraFoil® flexible graphite sealing solutions, materials, and processes are covered by one or more of the following US patents: 5,830,809; 5,981,072; 6,669,919. Other US and foreign patents granted or pending.