Double Jacketed Gasket is made from graphite, ceramic, non-asbestos, etc filler covered with a thin metal jacket, such as SS304, SS316, SS321, SS316Ti, Carbon steel, copper, etc.
With excellent sealing performance, it can be used in sealing spots of pressure vessels, heat exchangers, condensers, plain holes, etc.
| Metal material | DinMaterial No. | HardnessHB | Temperature (?) | Densityg/cm3 |
| CS/Soft Iron | 1.1003/1.0038 | 90~120 | -60~500 | 7.85 |
| SS304, SS304L | 1.4301/1.4306 | 130~180 | -250~550 | 7.9 |
| SS316, SS316L | 1.4401/1.4404 | 130~180 | -250~550 | 7.9 |
| Copper | 2.0090 | 50~80 | -250~400 | 8.9 |
| Aluminum | 3.0255 | 20~30 | -250~300 | 2.73 |
Other special metals, such as titanium and Monel are available.
Double jacketed gaskets have excellent sealing efficiency, provided by exerting strong pressure on circular rimes of the flanges, metal-jacketed gaskets can stand up to 30% deviation from the initial thickness, which is very useful in case of irregular or faulty flange rims. The chemical compatibility of the metal and the medium being sealed should be considered.
The filler material is completely enclosed by a two-piece metal jacket, which covers both the inside and outside diameters and both contact surfaces. It is designed for high pressure and temperature applications or where corrosion problems may exist with the filler being completely enclosed in a two-piece metal jacket.
Heat exchangers
Gas mains
Boilers and flues
Pumps and valve bonnets
Pipeline flanges
Internal combustion machinery
Double jacketed gaskets are particularly suitable for flanges with complex shapes and are commonly found in heat exchanger covers.
