DONIT TESNIT特力 DONIFLEX G-U密封垫片 石墨垫片耐高温
DONIFLEX® G-U
Devoid of any organic solvent, this graphite-based composite allaying aramid and special functional inorganics, is advanced heavy-duty material. It displays excellent physicochemical properties (thermal, chemical, stress resistance, etc.) with high compressibility and flexibility enabling it to conform to uneven surfaces. Steam supply, heating systems, and chemical industry are amongst its well-suited application. The version with a metal insert withstands higher pressures. Also, fitted with a highly performant anti-stick, gasket replacement is quite effortless following prolonged elevated temperature service.
PROPERTIES
APPROPRIATE INDUSTRIES & APPLICATIONS
| AUTOMOTIVE AND ENGINE BUILDING INDUSTRIES | CHEMICAL INDUSTRY |
| GENERAL PURPOSE | HEATING SYSTEMS |
| HIGH-TEMPERATURE APP. | PAPER & CELLULOSE INDUSTRIES |
| PETROCHEMICAL INDUSTRY | POTABLE WATER SUPPLY |
| POWER PLANT | STEAM SUPPLY |
| VALVES | WATER SUPPLY |
| Composition | Graphite, aramid fibers, functional inorganic fillers, NBR binder; optionally available with expanded metal reinforcement (AISI 316L, 0.15 mm) | |
| Color | Anthracite | |
| Approvals and compliances |
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| Sheet dimensions |
Size (mm): 1500 x 1480 | 2000 x 1480 |
|
| Tolerances |
± 5 % on length and width |
|
| Surface finish |
Standard: 4AS. Optional: IQ, graphite or PTFE |
TECHNICAL DATA
Typical values for 2 mm thickness
| Density | DIN 28090-2 | g/cm3 | 1.25 |
| Compressibility | ASTM F36J | % | 35 |
| Recovery | ASTM F36J | % | 25 |
| Tensile strength | ASTM F152 | MPa | |
| Longitudinal | 5 | ||
| Transversal | 5 | ||
| Stress resistance | DIN 52913 | ||
| 50 MPa, 16 h, 175°C | MPa | 42 | |
| 50 MPa, 16 h, 300°C | MPa | 37 | |
| Specific leak rate | DIN 3535-6 | mg/(s·m) | 0.05 |
| Thickness increase | ASTM F146 | ||
| Oil IRM 903, 5 h, 150°C | % | 3 | |
| ASTM Fuel B, 5 h, 23°C | % | 3 | |
| Weight increase | |||
| Oil IRM 903, 5 h, 150°C | % | 30 | |
| ASTM Fuel B, 5 h, 23°C | % | 25 | |
| Compression modulus | DIN 28090-2 | ||
| At room temperature: εKSW | % | 30 | |
| At elevated temperature: εWSW/200°C | % | 6 | |
| Creep relaxation | DIN 28090-2 | ||
| At room temperature: εKRW | % | 3.5 | |
| At elevated temperature: εWRW/200°C | % | 0.3 | |
| Creep deformation | |||
| Change in thickness at 20°C, 50 MPa | % | 30 | |
| Change in thickness at 300°C, 50 MPa | % | 12 | |
| Change in thickness at 400°C, 50 MPa | % | 15 | |
| Leachable chloride content | FSA NMG 202 | ppm | <20 |
| Leachable fluoride content | FSA NMG 203 | ppm | <20 |
P-T diagram EN 1514-1, Type IBC, PN 40, DIN 28091-2 / 3.8, 2 mm
