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DON 2.0 |
Doniflex® GR-EM is composite gasket material consisting of advanced graphite-based, "beater-addition" facing material mechanically bonded to a galvanized low carbon expanded mild steel. Due to expanded metal reinforcement, the gasket material features a number of outstanding properties as compared to conventional soft materials. It provides exceptional radial strength, significantly improved tensile strength, resilience and other fluid resisting properties required of a reliable material capable to cope with higher combinations of pressure and temperature stress.
The expanded metal reinforcement permits the optimization of surface pressure distribution on assembled gasket. Thanks to optimum properties and dimensions of expanded metal reinforcement gasket material also exhibits high sealability against gases at elevated temperatures. Doniflex® GR-EM can, therefore be used as a general purpose material for many industrial-sealing applications, as well as a high-performance gasketing material for dynamically and thermally stressed joints. Typical applications include sealing of water, steam, oils, hydrocarbons and chemicals where the medium to be sealed allows the use of a zinc-galvanized steel reinforcement. It can be used in flanges, fittings, pumps, valves, exhaust systems, engines, vessels and heat exchangers in automotive, petrochemical, pulp and paper, food, pharmaceutical industry, in power stations as well as in shipbuilding.
Basis | Aramid fibers, Graphite, NBR |
Color | Black |
Branded, without coating.
A special silver colored non-stick top and bottom layer as well as other additional surface treatments (silicone, PTFE) are available on request.
Typical values for a thickness of 1.0 mm
Density | DIN 28090-2 | g/cm3 | 1.75 - 1.95 |
Compressibility | ASTM F 36/J | % | 15 - 25 |
Recovery | ASTM F 36/J | % | min 20 |
Stress resistance (50 MPa, T=300°C, 16h) | DIN 52913 | MPa | min 40 |
Stress resistance (50 MPa, T=175°C, 16h) | DIN 52913 | MPa | min 42 |
Immersion in oil IRM 903, 5h, 150°C | ASTM F146 | ||
- thickness increase | % | max 10 | |
- weight increase | % | max 20 | |
Immersion in ASTM Fuel B, 5h, 20°C | ASTM F146 | ||
- thickness increase | % | max 10 | |
- weight increase | % | max 20 | |
Specific Leak Rate | DIN 3535/6 | mg/(s.m) | max 0.1 |
Specific Leak Rate at 100°C | DIN 28090/2 | mg/(s.m) | max 0.05 |
Specific Leak Rate at 300°C | DIN 28090/2 | mg/(s.m) | max 0.1 |
Creep deformation - 50 MPa | |||
- change in thickness at 300°C | % | max 10 | |
- change in thickness at 450°C | % | max 15 | |
Maximum continuous temperature | °C | 400 | |
Short-term peak temperature | °C | 500 |
Media resistance chart serves only as a guideline for the selection of material for particular application. Due to the variety of assembly and operating conditions, the data may not be used to support any warranty claims.
ACETALDEHYDE | liquid solutions | MALEIC ANHYDRIDE | liquid solutions |
AIR | oil, mineral oil products | MARLOTHERM | gas |
ALLYL CHLORIDE | miscellaneous | MERCURY | liquid solutions |
ALUM | liquid solutions | MERCURY SALTS | liquid solutions |
ALUMINIUM CHLORIDE | oil, mineral oil products | MINERAL OIL | liquid solutions |
ALUMINIUM SULPHATE | oil, mineral oil products | MINERAL OIL | liquid solutions products |
AMMONIUM PHOSPHATE | oil, mineral oil products | MOTOR OIL | liquid solutions |
ANILIN-HYDROCHLORIDE | oil, mineral oil products |
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ASPHALT | liquid solutions | NICKEL SALTS | oil, mineral oil products |
ASTM OIL NO.1 FUEL | gas | NITROGEN | oil, mineral oil products |
ASTM OIL NO.2 FUEL |
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ASTM OIL NO.3C FUEL | oil, mineral oil products | OIL ACID | oil, mineral oil products |
ASTM FUEL A |
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ASTM FUEL B | oil, mineral oil products | PARAFFIN | oil, mineral oil products |
ASTM FUEL C | oil, mineral oil products | PETROLEUM | oil, mineral oil products |
ASTM FUEL D | liquid solutions | PHOTOGRAPHIC EMULSIONS | oil, mineral oil products |
AZ 20 (32+125) | liquid solutions | PHTHALIC ANHYDRIDE | oil, mineral oil products |
| oil, mineral oil products | POLYETHYLENE GLYCOL |
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BEER | liquid solutions | POTASH | liquid solutions |
BENZINE | liquid solutions | POTASSIUM ALUM | oil, mineral oil products |
BITUMEN | liquid solutions | POTASSIUM BROMATE | oil, mineral oil products |
BORAX | liquid solutions | POTASSIUM BROMIDE | liquid solutions |
BRAKE FLUID (GLYCOL BASIS) | liquid solutions | POTASSIUM CARBONATE | oil, mineral oil products |
BUTADIENE | liquid solutions | POTASSIUM PHOSPHATE | oil, mineral oil products |
BUTENE (BUTYLENE) | liquid solutions | POTASSIUM SALT | oil, mineral oil products |
| liquid solutions | POTASSIUM SULPHATE |
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CALCIUM CHLORIDE | gas | PROPYLENE OXIDE | liquid solutions |
CALCIUM NITRATE |
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| liquid solutions |
CARBON DIOXIDE | liquid solutions | SACCHAROSE | gas |
CHLORINE GAS DRY | liquid solutions | SALT | gas |
CHROME ALUM | oil, mineral oil products | SANTOTHERM 66 | liquid solutions |
COCONUT OIL | liquid solutions | SEA WATER | oil, mineral oil products |
CONDENSATE WATER | oil, mineral oil products | SILICONE GRAESE | water, steam |
COPPER SALT | liquid solutions | SILVER SALT | liquid solutions |
| liquid solutions | SOAP SOLUTION |
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DEMINERALIZED WATER | liquid solutions | SODA | water, steam |
DEXTRINE | liquid solutions | SODIUM BROMIDE | liquid solutions |
DIESEL FUEL | liquid solutions | SODIUM CARBONATE | oil, mineral oil products |
DIPHYL ( HEAT CARRIER OIL) | liquid solutions | SODIUM CHLORIDE | oil, mineral oil products |
| liquid solutions | SODIUM DISULPHITE |
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ETHYLCELLULOSE | liquid solutions | SODIUM DITHIONITE | liquid solutions |
| liquid solutions | SODIUM FLUORIDE |
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FRUIT JUICE | liquid solutions | SODIUM HYDROGEN-CARBONATE | liquid solutions |
FLUE GAS | liquid solutions | SODIUM HYDROGEN-SULPHATE | gas |
FURNACE GAS | liquid solutions | SODIUM HYDROGEN-SULPHITE | gas |
| liquid solutions | SODIUM IODIDE |
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GEAR OIL | liquid solutions | SODIUM PERBORATE | oil, mineral oil products |
GELATIN | liquid solutions | SODIUM PHOSPHATE | liquid solutions |
GENERATOR GAS | liquid solutions | SODIUM SILICATE | gas |
GLAUBER SALT | liquid solutions | SODIUM SULPHATE | liquid solutions |
GLUCOSE | liquid solutions | SODIUM SULPHITE | liquid solutions |
GLYCOL | liquid solutions | SODIUM THIOSUPHATE | liquid solutions |
GLUE | oil, mineral oil products | SPINDLE OIL | liquid solutions |
| oil, mineral oil products | SPIRITS |
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HEAT CARRIER OIL | liquid solutions | STARCH SOLUTION | oil, mineral oil products |
HEPTANE (-n) | water, steam | STEAM | oil, mineral oil products |
HEXANE (-n) | gas | SULPHUR DIOXIDE | oil, mineral oil products |
HOT WATER | oil, mineral oil products | SYLTHERM 800 | water, steam |
HYDRAULIC OIL | oil, mineral oil products | SYNTREL 350 | oil, mineral oil products |
HYDROSULPHITE |
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| liquid solutions |
| liquid solutions | TANNIC ACID |
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INERT GAS | oil, mineral oil products | TAR | gas |
ISOOCTANE | oil, mineral oil products | TEST BENZINE | oil, mineral oil products |
ISOPROPYL ACETATE | oil, mineral oil products | TETRAETHYL LEAD | liquid solutions |
| oil, mineral oil products | TRANSFORMER OIL |
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KEROSINE FUEL | liquid solutions | TRI SODIUM PHOSPHATE | oil, mineral oil products |
| oil, mineral oil products | TURBINE OIL |
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LANOLINE (WOOL GREASE) |
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| liquid solutions |
LATEX | oil, mineral oil products | VASELINE | liquid solutions |
LAUGHING GAS | oil, mineral oil products | VEGETABLE FAT | gas |
LIGHTING GAS | oil, mineral oil products | VEGETABLE OILS | oil, mineral oil products |
LINK UP MEDIUMS | gas | VINYL CHLORIDE | liquid solutions |
LINSEED OIL |
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| liquid solutions |
LITHIUM BROMIDE | liquid solutions | WASCHING AGENT | liquid solutions |
LUBRICATING OIL | gas | WASTE GAS | oil, mineral oil products |
| liquid solutions | WASTE WATER |
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MACHINE OIL |
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| oil, mineral oil products |
MAGNESIUM SALT | liquid solutions | ZINC SALTS | liquid solutions |
