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Ningbo Techo Sealing Gasket Co.,Ltd

Add:No.345 Qiaotou Road, Qiaotou Town, Cixi, Ningbo China

Contact us:QianJin Yao

Tel:+86-574-66376117

Fax:+86-574-63555206

Mobile(whatsapp) :+86-13567800866

E-mail:sales@gasket-china.com

Pure Expanded Graphite Sheet

Pure Expanded Graphite Sheet

Graphite foil is an excellent sealing material for high temperature, high-pressure transfer of liquids, gases, steam, chemicals and corrosives. It is manufactured from high purity, high crystalline natural graphite flakes, which are processed into continuous foil by a special acid and thermal...

Product Details

Graphite foil is an excellent sealing material for high temperature, high-pressure transfer of
liquids, gases, steam, chemicals and corrosives. It is manufactured from high purity, high
crystalline natural graphite flakes, which are processed into continuous foil by a special acid
and thermal treatment to produce expanded graphite crystals. The expanded graphite
crystals are then formed into foil through an extensive calendaring process without
any resins and binders.

 

Advantages of HPMS Graphite Foil

- Excellent thermal stability and reflectivity.
- Resistant to low temperature of -200 °C.
- Resistant to high temperature of 450 °C in air, 700 °C in steam and 3000 °C in inert or  
reducing environment.
- Chemically inert: Resistant to fluids with pH range of 0-14 (except strong
oxidizers such as nitric or sulphuric acid).
- High purity: eliminates potential fluid contamination, ideal material for nuclear applications
- Low coefficient of friction: It is self-lubricating.
- Asbestos free: no associated health hazards.
- Low electrical resistivity.
- High thermal conductivity.
- Highly anisotropic:  the electrical and thermal conductivity characteristics are very
different in the direction parallel to and perpendicular to flakes.    
- Excellent in-process longevity: save replacement and down time costs.

Applications
- Gaskets material in automotive, petroleum and chemical, paper, and nuclear industries.
- Thermal barrier at high temperature to provide outstanding reflectivity.
- Fuel cell industry for bipolar plates.
- Excellent for sealing high temperature valves, shafts and flanges.
- Excellent linings and protective layer for vessels containing hot or corrosive fluids.

Typical Properties of HPMS Graphite Foil

ITEM

UNIT

VALUE

Thickness (Roll)

inch

0.006 - 0.06

Thickness (Sheet)

inch

0.06 - 0.24

Width

inch

4 - 60

Length

feet

100 - 1000


(1) Excellent Quality: Quality control starts with strict standards for the selection of the flake 
graphite, which is a critical element for the quality of the final product, and continues through 
the acid and the thermal treatment, to testing the final product. The extensive testing 
throughout the process ensures all key stages of the production are kept within specific 
tolerance limits. The result is high quality graphite foil with high tensile strength, high purity 
and excellent compressibility. The whole manufacturing process is ISO 9001 certified.

(2) Wide Selection Ranges: We offer a full line of graphite foil: homogeneous rolls and sheets (width from 2" to 60"), as well as reinforced sheets with stainless steel or perforated stainless steel sheet inserted. Non standard sizes and grades are also available on request.

(3) Superior Customer Service: We are committed to your complete satisfaction and we 
strive to provide you with the best service in the industry. With HPMS, you can expect 
prompt  responses, personal attention and on time delivery.


PROPERTY

UNIT

Grade AA

Grade A

Grade B

Grade C

Carbon
   
(minimum)

%

99.5

99

99

98

Ash
   
(maximum)

%

0.5

1.0

1.0

2.0

Density

g/cc

0.7 - 1.5

0.7 - 1.5

0.7 - 1.5

0.7 – 1.5

Tensile Strength

MPa

5.2

4.5

4.5

4.0

Chloride

ppm

≤35

≤40

≤45

≤50

Sulphur

ppm

≤500

≤1000

≤1200

≤1500

Compressibility

%

>40

>40

>40

>40

Recovery

%

>15

>15

>15

>15

Compatible pH Range

pH

0 - 14

0 - 14

0 - 14

0 - 14

Application
     
Temperature
     
(Minimum)

Deg. C  /
     ( Deg. F )

-200/
     (-328)

-200/
     (-328)

-200/
     (-328)

-200 /
     ( -328 )

Application
     
Temperature
     
(Maximum)






In Air

Deg. C  /
     ( Deg. F )

450/
     (842)

450/
     (842)

450/
     (842)

450 /
     ( 842 )

In Steam

Deg. C  /
     ( Deg. F )

700/
     (1292)

700/
     (1292)

700/
     (1292)

700/
     ( 1292 )

In reducing
   
environment

Deg. C  /
     ( Deg. F )

3000/

3000/
     (5432)

3000/
     (5432)

3000 /
     ( 5432 )

TECHO is one of the leading manufacturers and suppliers of various sealing products in China. We have skillful and experienced workers in our factory. Now take action to wholesale quality pure expanded graphite sheet made in China with us.

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