Flexible Graphite Gasket Material


 
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Flexible Graphite Gasket Material

 
 

Flexible Graphite

American Seal & Packing offers a complete line of premium flexible graphite sheet material  used commonly in high temperature sealing applications. Select from the styles below for more details.   

Flexible graphite sheet gasket material was once thought of as a specialty gasket material for extreme temperatures and chemical services. Today, due to economies of scale, and increased competition, flexible graphite has become an affordable option for the majority of applications. The main reason is flexible graphite can replace a wide range of gasket materials, making selecting the right material for the job safe and simple. Where you once had to have many variations or gasket materials, flexible graphite makes the selection process easy.

High Temp applications to 850 F - No question, flexible graphite will seal it!.

High Temperature applications over 850 F - The answer still can be flexible graphite. This is true for 2 reasons:

1) Some grades of flexible graphite contain an oxidation inhibitor giving it the capability of sealing up to 900 F.
2) Heat is not the first thing to attack flexible graphite, it’s oxygen and heat together.

Flexible graphite can withstand up to 5,400 F as long as oxygen is not present. At 850 F and above it’s a sliding scale. In reduced oxygen atmosphere such as steam, flexible graphite will handle 1200F. If you have doubt’s about your application please contact us at support@aspseal.com

Chemical applications that once could only use Kalrez, Viton, Chemrez, PTFE, or Gylon, flexible graphite will seal it most of the time (depending on pressure). Because sulfuric acid and Nucleic acids are used to produce flexible graphite, reintroducing it to those chemicals can also break it down.

Steam Applications - Flexible graphite will seal it. When using flexible graphite on stem flanges, be aware that while the steam is sealed, due to flexible graphite’s conductivity characteristics it can appear to “sweat” (but not leak) in humid areas.

Oil and Gas we once always sealed with non-asbestos gasket materials. While non-asbestos does a good job, flexible graphite gasket material does a better job! EQMD, Air quality leakage rates control is met everyday by refineries around the world using flexible graphite. Like most materials, it is possible to replace non-asbestos with flexible graphite in the interest of standardizing on one material.

Where you don’t want to use flexible graphite is in Food, FDA, NSF, or any application where graphite contamination could be an issue. Flexible graphite will particle transfer. It’s carbon, so it will act like a lead pencil.

GTB and GTA GRAFOIL Equivalents Grafoil GHR Equvalent GHE Equivalent

 Plain Flexible Graphite

Flexible Graphite w - SS Foil Insert

Flexible Graphite w  - SS Tang Insert

Flexible Graphite Material
Physical Properties

Flexible Graphite Gasket Physical Properties Flexible Graphite Gasket Material
Physical Properties
Color Silver/Grey

Color

Silver/Grey Color Silver/Grey
Density (lb/cubic ft) 70 lb/ft3 Density (lb/cubic ft) 70 lb/ft3 Density (lb/cubic ft) 70 lb/ft3
Maximum Temp in Oxidizing Atmosphere 900F Maximum Temp in Oxidizing Atmosphere 900F Maximum Temp in Oxidizing Atmosphere 900 F
Maximum Service Pressure 1500 psi Maximum Service Pressure 2000 psi Maximum Service Pressure 2000 psi
Compressibility @5000 psi (%) 49% Compressibility @5000 psi (%) 35% Compressibility @5000 psi (%) 35%
Recovery Minimum (%) 15% Recovery Min (%) 17% Recovery Min (%) 17%
Creep Relaxation ASTM F38B(max %) 4% Creep Relaxation ASTM F38B(max %) 4% Creep Relaxation ASTM F38B(max %) 4%
Gas Permeability - Nitrogen DIN 3535/6 2800 Gas Permeability - Nitrogen DIN 3535/6 2800 Gas Permeability - Nitrogen DIN 3535/6 2800
Pressure x Temperature (P x T) 700,000 Pressure x Temperature (P x T) 700,000 Pressure x Temperature (PxT) 700,000
Ash Content - Din 51903 <1% Ash Content - Din 51903 <1% Ash Content - Din 51903 <1%
Chloride and Fluoride Content <50ppm Chloride and Fluoride Content <50ppm Chloride and Fluoride Content <50ppm
       
 

Flexible Graphite Gasket Material

Flexible graphite made from material typically 98% graphite. Leachable chloride typically less than 50 ppm. Sulfur content: 1200 ppm. Compressibility: 45% Recovery: 20%. Creep relaxation: 5%. Density: 62.4 lbs/ft. Tensile strength: 700 PSI. Temperature range (oxidizing atmosphere): -400 F to 750 F.

316 S.S. Foil Inserted  Flexible Graphite Material

Flexible graphite sheet reinentorced with a 316 stainless steel foil (0.002 thick) made from material typically 98% graphite. Leachable chloride typically less than 50 ppm. Sulfur content: 400 ppm. Compressibility: 35%. Recovery: 18%. Creep relaxation: 12%. Density: 62.4 lbs/ft. Tensile strength: 5000 PSI. Temperature range (oxidizing atmosphere): -400 F to 750 F.

Quantity

FGS4-0625-59
Flexible Graphite
w/ foil
Gasket Material
59" x 59" 1/16" $  207.90

Quantity

FGS4-1250-59
Flexible Graphite
w/ foil
Gasket Material
59" x 59" 1/8" $  425.53

Quantity

FGS4-1950-1175-062
Flexible Graphite
w/ 316 foil
19.5" x 11.75" 1/16" $  28.00

316 S.S. Foil Inserted  Flexible Graphite Gasket Material

Flexible graphite sheet laminate gasket material with tang 316 stainless steel insert (0.005 thick) made from material typically 98% graphite. Leachable chloride typically less than 50   ppm. Sulfur content: 400 ppm. Compressibility: 35%. Recovery: 18%. Creep relaxation: 10%. Density: 62.4 lbs/ft. Tensile strength: 5000 PSI. Temperature range (oxidizing atmosphere): -400 F to 750 F

Quantity

FGS3-0625-40
Flexible Graphite w/ Tang
Gasket Material
59" x 59" 1/16" $  214.40

Quantity

FGS3-1250-40
Flexible Graphite w/ Tang
Gasket Material
59" x59" 1/8" $  432.62

Quantity

FG3-1950-1175-062
Flexible Graphite w/ Tang
19.50" x 11.75" 1/16" $ 32.00

Flexible Graphite Gasket Material- Seals like no other sealing material. Flexible graphite will handle higher temperatures than any elastomeric of non-asbestos gasketing and handle a ph range from 0-14.

Developed originally by Union Carbide under the brand name "Grafoil".  Flexible graphite solves industries difficult sealing applications.

 

Call American Seal & Packing for your gasket material requirements  at
(714) 593-9780 today!

 


 
 
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