What material is grafoil?

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.

What is difference between graphite and grafoil?

Flexible graphite is a generic commercial term. The name Grafoil^® is the original brand name of flexible graphite owned by GrafTech, a company founded in 1886. Grafoil^® material was first introduced by Union Carbide in the 1960s. Flexible graphite is 95% – 99% carbon.

Is grafoil non-asbestos?

It is an ideal facing material for flat gaskets It contains no binders or resins. No binders or resins. Non-fibrous. Non-asbestos.

How is grafoil made?

UCAR Carbon manufactures GRAFOIL� Flexible Graphite as a rolled sheet product by taking a high quality particulate graphite flake and processing it through an intercalation process using strong mineral acids. The flake is then heated to volatilize the acids and expand the flake to many times its original size.

What is grafoil tape?

Grafoil® Flexible Graphite begins as graphite flake which is chemically expanded and then rolled into sheets. Those Grafoil® sheets are then stripped into tape or rolled and cut into gasket material (which we cut gaskets from) or packing.

What is Graphene? | Chemistry - Materials: How they work

What is grafoil used for?

The Most Recognized Flexible Graphite Gasket Material

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.

Is grafoil conductive?

Like its forerunner, pyrolytic graphite, GRAFOIL flexible graphite is resistant to heat, has no water of crystallization, is naturally lubricious, is chemically inert, and is an excellent conductor of heat and electricity.

What is flexible graphite?

Flexible graphite – also known as expanded graphite or exfoliated graphite – is produced from purified natural graphite flakes. In the manufacturing process the flakes are mixed with a highly oxidizing acid to produce graphite intercalation compounds. These are expanded by a sudden application of high temperature.

What is PTFE gasket?

PTFE gaskets are made of synthetic fluoropolymer of tetrafluoroethylene consisting completely of carbon and fluorine. It is innately hydrophobic (repelling water and water-containing substances) and has one of the lowest coefficients of friction against any solid.

Where do you find graphite?

China has the largest reserves in the world, distantly followed by Mexico, the Czech Republic, Madagascar and India. Several other countries, including Canada, Germany, Sri Lanka and North Korea, also produce graphite. Natural graphite is mined from open pit and underground mine operations.

What is the best head gasket material?

Copper gaskets are extremely durable which makes them perfect for high performance engines. Copper transfers heat evenly throughout the entire gasket, and this reduces the effects of warping. Copper is also good at conforming to rougher, damaged surfaces for a complete seal.

What is the difference between asbestos and non asbestos?

Asbestos are used in gasket because it can with stand high pressure ,High Temperature&its chemically inert in nature. Non asbestos gasket are made from man made fiber like carbon fiber, aramid fiber, synthetic fiber with NBR binder which insure pressure resistance, temperature resistance, chemical resistance.

What is non asbestos gasket material?

Most of todays non-asbestos gasket materials contain either Kevlar, an aramid fiber, fiberglass, carbon, graphite or another mineral fiber.

What is Garlock material?

Garlock gaskets are offered in a wide range of materials and configurations, including GYLON^® Restructured PTFE, Compressed Fiber, GRAPH-LOCK^® Flexible Graphite, THERMa-PUR^® Extreme Temperature, High-Performance Premium Rubber, Metallic Gaskets, Non-Metallic Cut Gaskets, and the new TUFF-RAIL^® Tank Car Manway Gaskets.

What is a Kammprofile gasket?

Kammprofile gaskets (also called as Kamprofile gasket or Camprofile gasket or Grooved gasket) are gaskets that come with a metal core bonded with a soft filler material on both sides. After installation of the Kammprofile gasket, the soft non-metallic filler gets pushed into the metal core serrated grooves.

What is GHR gasket?

GRAFOIL Grade GHR is an uncured laminate made with GRAFOIL Grade GTB flexible graphite adhesively bonded to both faces of a 0.002” thick flat 316 or 316L stainless steel insert. Surface identifiable, laminate is branded with the GRAFOIL grade and source guarantee. METAL REINFORCED LAMINATES. STANDARD GRADES.

Is PTFE rubber or plastic?

It isn't metal, it isn't rubber, and it also isn't exactly plastic. More specifically, PTFE is a thermoplastic polymer primarily characterised by a slippery surface, high melting point, and resistance to “attack” by almost all chemicals.

Is PTFE and Teflon the same thing?

Essentially, the only difference lies in the name. PTFE is the shortened name of the chemical polytetrafluoroethylene, and Teflon is the trade name of the same polymer. If you are looking for a highly flexible, non-stick material that is chemical, electrical and thermal resistant, look no further than PTFE.

How are PTFE gaskets made?

PTFE, Expanded Gaskets

Expanded PTFE gasket material is produced by expanding Virgin PTFE using a process that creates a uniform and highly fibrillated microstructure with equal tensile strength in all directions. This means that expanded PTFE possesses no structural weakness or a “grain”.

What is flexible graphite made of?

Flexible graphite is made from natural graphite flakes.

Following chemical preparation with acids and oxidizing agents, the natural graphite is expanded by a violent heat treatment procedure. Self-bonded by a rolling operation, the expanded graphite particles form a continuous strip, without the addition of a binder.

How do you make graphite flexible?

Flexible graphite is created by submerging flake graphite into chromatic and sulfuric acid, then exposing it to intense heat. This weakens the bonds between each of the layers, expanding the graphite. Graphite is non-metallic, formed by metamorphosis of organic-rich sedimentary rocks.

Is graphite flexible or brittle?

Graphite is naturally a very brittle compound and cannot be used as a structural material on its own due to its sheer planes (although it is often used to reinforce steel).

What is a ghe gasket?

GRAFOIL Grade GHE laminate is made with GTB flexible graphite mechanically bonded to both faces of a 316 or 316L stainless steel tang metal insert. Surface identifiable, laminate is branded with the GRAFOIL grade and source guarantee. METAL REINFORCED LAMINATES.

What is NBR binder gasket?

NBR is a popular material for valves and pumps that offers solid temperature and chemical resistance, thanks to its unique makeup. Common applications for non-asbestos gaskets are sealing, automotive, oil & gas and those that involve acids and other chemicals.