Graphite Sheet Gaskets Grafilit SF
MATERIAL
Gasket material with excellent creep, strength, chemical stability and high tightness. Graphite itself or laminated with flat / tanged stainless steel insertion is used as a temperature and chemical resistant gasket in chemical, petrochemical and many other industries.
PROPERTIES AND APPLICATION
GRAFILIT SF is a gasket material with very low creep relaxation and high tightness at low bolt loading. It is suitable for almost all chemicals, in food industry and in contact with drinking water. Because of its high compressibility it is suitable for glass or enamel flanges.
BASIS
Flexible graphite sheets
APPROVALS APPLIED FOR
BAM (oxigen), DIN-DVGW, DIN 35356, DVGW KTW, DVGW VP 401
(HTB)
TECHNICAL DATA
Typical values for a thickness of 1.5 mm
DIMENSIONS OF STANDARD SHEET
- Sheet size (mm):1000 x 1000
- Thickness (mm): 1.0 | 1.5 | 2.0 | 2.5 | 3.0
Other dimensions and thicknesses on request.
Rolls size :
- width (mm) : 4-1000
- length (m) : 50
- thickness (mm) : 0.5 | 0.8
| Compressibility | ASTM FA36 | % | 45 |
| Recovery | ASTM FA36 | % | 13 |
| Stress resistance (16h, 300°C) | DIN 52913 | Mpa | 49 |
| Permeability to nitrogen (40bar, RT) | DIN 35356 | mg/(s.m) | <0.02 |
| Ash content of graphite | DIN 51903 | % | <1 |
| Chloride content | FSA NMG 202 | ppm | <50 |
| Fluoride content | FSA NMG 203 | ppm | <50 |
| Density of the graphite | DIN 28090-2 | g/cm3 | 1.0 |
| Compression modulus | DIN 28090-2 | ||
| At room temperature: Eksw | % | 38 | |
| At elavated temperature: Ewsw/300°C | % | 0.9 | |
| Percentage creep relaxation | DIN 28090-2 | ||
| At room temperature: Eksw | % | 5.0 | |
| At elavated temperature: Ewsw/300°C | % | 4.5 | |
| Recovery R | DIN 28090-2 | mm | 0.088 |
| Operating conditions | |||
| Continuous use max. temperature* | |||
| Air or oxidizing atmosphere | °C/°F | 450/842 | |
| Reducing or inert atmosphere | °C/°F | 2500/4532 | |
| Continuous use min. temperature* | °C/°F | -200/-328 | |
| Continuous use max. pressure* | bar/psi | 80/1160 |
* Service limits are recommended for proper sealing conditions and gasket design.