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metal spiral wound gasket with graphite or PTFE filler, with inner ring
The gasket comprises a spirally-wound beaded metal band ( Standard: 316L; other materials possible ) in which a non-metallic band ( graphite or PTFE ) overlaying on both sides is inserted between the individual spirals of the metal band. The inner ring serves to increase radial stability. It is used in flanges with male/female faces in the petrochemical industry, for problem applications and in the high-pressure sector.
Cross-section
Operating Limits
| Graphite | PTFE | |
| Operating pressure | max. 320 bar | max. 320 bar |
| Temperature range | –200oC to +550oC | –200oC to +250oC |
| *from 450oC please consult manufacturer | ||
Gasket Factor
| Graphite | PTFE | ||
| ÓVU 0,1 | 50N/mm2 | ÓVU 0,1 | 45N/mm2 |
| ÓVO | 300N/mm2 | ÓVO | 300N/mm2 |
| ÓBO300oC | 220N/mm2 | ÓBO200oC | 240N/mm2 |
| m (DIN2550) | 1,4 | m (DIN2550) | 1,2 |
Approvals
- TA-LUFT 2002 (VDI 2440 / VDI 2200)
- Fire Test as per API 607 Rev.4 (with graphite filler)
