Re: Thru hull seals

[protek@shreve.net]

John,
    Why don't you use O-Rings?  Works great for me and you do not have to
worry about packings.

Gary B.


At 06:13 PM 9/8/98 -0700, you wrote:
>
>	Hello everyone, first-time poster and hopefully not raising
>anyone's ire by responding.
>	This question actually relates to one of my own. Briefly, I am
>trying to calculate the failure pressure for a stuffing box of my own
>design. I do not mean the structure itself, i.e. the flange-hull mount is
>not the subject of this calculation, but rather how much stuffing is
>required to seal against a known hydrostatic pressure. If the shaft
>through the box is stationary, this is a simple viscosity problem but it
>is moving. I'm not sure how best to treat the motion of a control or drive
>shaft in this seal. Also, some stuffing is lost over time in operating the
>shaft through the stuffing box. Anyone have a good reference on estimating
>the loss per linear or radial distance the control rod is moved through?
>	Any thoughts on how to set up this analysis? I've got an
>engineering background, but not a maritime one specifically. Thanks for
>your ideas or references,
>
>							John
>
>John Brownlee
>Lunar and Planetary Lab
>University of Arizona
>jonnie @ lpl . arizona . edu
>
>
>