Mechanical seals
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United States of America Patent
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Jun 28, 1994
Grant Date -
N/A
app pub date -
Oct 6, 1992
filing date -
Oct 10, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a sleeve for a cartridge-mounted mechanical seal, the sleeve being formed from two connected-together metallic components. The first component is made from a material having a relatively high chemical resistance, the second from a material having a relatively lower chemical resistance. The arrangement of the components is such that, in use as part of a seal, the sleeve has only its first component in contact with the fluid whose escape is being sealed. Such a sleeve is easier and cheaper to produce than one made entirely from a high chemical resistance material, and yet just as effective in use. The invention also provides a seal including such a sleeve.
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