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High Temperature GRAFOIL® Seals & Gaskets

The best thing to happen to the sealing and gasket industry over the last 25 years has got to be Flexible Graphite or GRAFOIL®. These high temperature seals made of Sheet, Ribbon, Braided Packing and Ribbon Pack®. Today flexible graphite solves more industry VOC and high temperature applications and any other material.


Grafoil Ribbon Pack®


Ribbon Pack® is slit from Grafoil flexible Graphite Sheet. Once slit, it is either rolled as is (Smooth) or has a crinkel added to it to make it easier to wrap around smaller shafts.Once rolled, it is then used to make die formed rings either in our shop or in the field. Ideal for making your own high temperature seals.

Flexible graphite sheet seals with less compressive load than most other gasket material sheets. The result is it seals faster and better than other sheet gasket materials. The term Flexible graphite is a bit of a misnomer. It is far more flexible than Graphite (a rock) and is an excellent high temperature seal, but does not have the flexibility of rubber. To improve handleability metal foil, tang or a plastic insert can be added to prevent cracking the homogeneous sheet. Available in a range of grades from automotive & Industrial to Nuclear.

In many high temperature seal applications when oxygen is present and the temperature is over 850 F the ideal sealing material "GRAFOIL® " flexible graphite cannot be used. Flexible graphite will coke at those elevated temperatures when oxygen is present.  An excellent alternative in many applications is Mica.  Some of the basics on Mica are shown below.  As a gasket material Mica can be very effective in sealing those high temp critical applications with out failing due to the presence of oxygen.  For more information on Mica click here

Solving Industrial Valve applications has been a large success story for flexible graphite die formed or combination sets. The EPA, or state air quality management entity has required valves to meet specific Volitial Organic Chemical (VOC) leakage rates. Flexible graphite sets are a part of every set that meets this standard. We offer a variety of sets, and designs to meet these tough seal requirments.

Flexible Graphite Packing   Temp: 1200 F Steam,  0-14 pH

Although Flexible graphite has very little tensile strength, it is possible to pull flexible graphite yarn through a braider if you add a fine fiberglass filiment thorugh the yarn. This cleaver modification to flexible graphite, gave us a packing that works so well in pumps that it can even be run dry it adjusted slowly. Beacuse is has no fillers or blocking agents it does not wash out like most packings. It is rated by Rockwell valve to last the life of the valve for this very reason.

flexible graphite Packing


Check out these Videos on GRAFOIL®  


GRAFOIL® is Fire Safe How GRAFOIL® is made

Call us at: 714-593-9780    Fax: 714-593-9701      

GRAFOIL® and Ribbon Pack® are registered trademarks of GrafTech International Holdings Inc.
high temperature seals


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