Gaskets are materials used to seal one compartment of a device ...
Gaskets are materials used to seal one compartment of a device ...
Gaskets are materials used to seal one compartment of a device ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Table 5. Substitutes for Asbes<strong>to</strong>s Packings<br />
Product Advantages Disadvantages Remarks References<br />
Aramid Very strong.<br />
Tear resistant.<br />
High tensile strength.<br />
Unable <strong>to</strong> handle strongly<br />
acidic or basic fluids.<br />
500SF temperature limit.<br />
Widely known.<br />
Used in the paper industry.<br />
ICF 1986a, ICF 1985<br />
Fibrous Glass Withstands temperature <strong>to</strong><br />
1000F.<br />
Good tensile properties.<br />
P~brasive. Market is growing for glass. ICF 1986a, OGJ 1986,<br />
Chem. Eng. News 1986<br />
Polybenzimidazole (PBI) Withstands temperature <strong>to</strong><br />
1000SF.<br />
Poorer wettability premium<br />
premium price.<br />
Used in high temperature,<br />
high pressure applications.<br />
ICF 1986a, OGJ 1986<br />
PTFE Low friction.<br />
FDA approved <strong>to</strong> contact food<br />
and medical equipnent.<br />
Not as resilient as asbes<strong>to</strong>s.<br />
Deforms under heavy loads.<br />
Temperature resistance <strong>to</strong><br />
500F.<br />
ICF 1986a, OGJ 1986,<br />
Palmet<strong>to</strong> Packing 1986<br />
Graphite Heat resistant up <strong>to</strong> 5000F.<br />
Chemical resistance.<br />
Brittle.<br />
Frays.<br />
Premium price.<br />
Usually with a wire insert.<br />
Used in high temperature,<br />
applications.<br />
Palmet<strong>to</strong> Packing 1986,
Change language