Expandable graphite still retains the characteristics of natural flake graphite, and also has good expandability, it is loose and porous.
Made of high quality natural flaky graphite through special chemical modification at high temperature, and has the expansion ratio from 100 to 400 ml/g.
Its heat-resistance ranges -200 °C to 3000 °C under oxygen-free environment, and it is chemically stable under high temperature, pressure or radiation.
It is widely used in the dynamic and static seals in petroleum industry, chemical industry, electric industry, space industry, and automobile industry, etc.
According to the needs of the market, we are able to offer ultra low sulphur expandable graphite and ultra fine expandable graphite, too.
Available Types and Main Properties
Expandable Crystalline Flake Graphite
|
Grade
|
Volatile, Max.
|
Ash, Max.
|
Moisture, Max.
|
PH value
|
Particle size, Min.
|
Expansion multiple
(M/G)
|
|
(%)
|
(%)
|
(%)
|
|
(%)
|
|
|
N-EX300
|
15
|
1
|
1
|
3 - 7
|
75
|
300
|
|
N-EX280
|
15
|
1
|
1
|
3 - 7
|
75
|
280
|
|
N-EX150
|
15
|
15
|
1
|
3 - 7
|
75
|
150
|
|
N-EX250
|
15
|
1
|
1
|
3 - 7
|
75
|
250
|
|
N-EX250
|
15
|
5
|
1
|
3 - 7
|
75
|
250
|
|
N-EX250
|
15
|
15
|
1
|
3 - 7
|
75
|
250
|
|
N-EX180
|
15
|
15
|
1
|
3 - 7
|
75
|
180
|
|
N-EX200/1
|
15
|
1
|
1
|
3 - 7
|
75
|
200
|
|
N-EX200/5
|
15
|
5
|
1
|
3 - 7
|
75
|
200
|
|
N-EX150
|
15
|
15
|
1
|
3 - 7
|
75
|
150
|
|
N-EX120
|
15
|
15
|
1
|
3 - 7
|
75
|
120
|
|
N-EX100
|
15
|
15
|
1
|
3 - 7
|
75
|
100
|
Ultra Low Sulphur Expandable Graphite
|
Grade
|
Fixed
carbon
|
Ash
|
Volatile
|
Expansion ratio
|
Sulphuric acid content
|
PH value
|
Moisture
|
Particle size screen oversize
|
|
(%)
|
(%)
|
(%)
|
(ml/g)
|
(%)
|
(%)
|
(%)
|
(%)
|
|
N-EX ULS32
|
90 - 99.9
|
8.0 Max.
|
10 Max.
|
200 - 400
|
0.03 Max.
|
3 - 7
|
1.0 Max.
|
80 Min.
|
|
N-EX UL50
|
90 - 99.9
|
8.0 Max.
|
10 Max.
|
200 - 350
|
0.03 Max.
|
3 - 7
|
1.0 Max.
|
80 Min.
|
|
N-EX ULS80
|
90 - 99.9
|
8.0 Max.
|
10 Max.
|
150 - 250
|
0.03 Max.
|
3 - 7
|
1.0 Max.
|
80 Min.
|
|
N-EX ULS100
|
90 - 99.9
|
8.0 Max.
|
10 Max.
|
100 - 200
|
0.03 Max.
|
3 - 7
|
1.0 Max.
|
80 Min.
|
Ultra Fine Expandable Graphite
|
Grade
|
Fixed carbon
|
Ash
|
Volatile
|
Expansion ratio
|
Sulphuric acid content
|
PH value
|
Moisture
|
Particle size screen oversize
|
|
(%)
|
(%)
|
(%)
|
(ml/g)
|
(%)
|
(%)
|
(%)
|
(%)
|
|
N-EX UF100
|
90 - 99
|
8.0 Max.
|
15 Max.
|
30 - 300
|
2.2 Max.
|
4 - 7
|
1.0 Max.
|
80 Min.
|
|
N-EX UF200
|
90 - 99
|
8.0 Max.
|
15 Max.
|
15 - 50
|
2.2 Max.
|
4 - 7
|
1.0 Max.
|
80 Min.
|
|
N-EX UF325
|
90 - 99
|
8.0 Max.
|
15 Max.
|
10 - 20
|
2.2 Max.
|
4 - 7
|
1.0 Max.
|
80 Min.
|
Characteristics and Benefits
- Good expansibility
- Pressure resistance
- Self-lubricating material
- Flexible
- High chemical resistance and chemical stability. 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
Applications
- High quality raw material for different types of graphite plates and sealing materials
- Exothermic compound, flame retardant in metallurgical industry
- High-tech industry
- Military industry
- Nuclear energy
- Chemical industry
- Vehicle industry
