[Public-List] Packing Gland

[George Dinwiddie]

Rick

Thanks for that link.  I've created the page 
http://alberg30.org/maintenance/MechanicalPropulsion/DriplessSeal/ and 
linked to that article.  If someone would like to add more in defense of 
these mechanical seals, there's a link to an appropriate "collaborate" 
page for that.  I'll be glad to incorporate your comments into this 
page, if you'd like.  I'm just not the one to write up these devices.

  - George

Rick Leach wrote:
> Ahoy all,
> I'm supposing that the "21st century" device is a mechanical seal,
> like those used with great success and reliability on pumps, etc.
> They are, as Gord points out, great...right up until the moment they
> become an emergency.  Unlike pumps, which are generally very well
> aligned and easy to access, the prop shafts on our boats are not.
> I've installed dozens of mechanical seals with good success, but
> would never consider one for this application.  Instead, like many
> others on the list, I've had good results with the teflon putty that
> is designed to replace all but the first and last packing rings in
> the stuffing box.  It wasn't much easier to install than regular
> packing, but it seems to be lasting a lot longer, with less leakage.
> It seems to require less compression too.  That has to help the shaft
> last longer too.  If you're interested, search for "Drip Less
> Moldable PTFE Packing".
> 
> Here's a link to an article that discusses the various options:
> http://seagrant.uaf.edu/bookstore/boatkeeper/dripless-seals.pdf

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   When I remember bygone days                         George Dinwiddie
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   So many I loved were not yet dead,           http://www.Alberg30.org
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