[PSUBS-MAILIST] Conning tower hatch O-Ring

[James Frankland via Personal_Submersibles]

Hi Mark,

Just one thing to add along with the other posts.

Think about the paint thickness.  This can really mess up the size of the
groove.  When I fitted my hatch O ring I messed about with various
different thicknesses of cord to try and compensate for the paint.  In the
end, I had the hatch seat re-blasted and painted it again with a much
thinner coat.  I still had to use a custom O ring.  In fact, I had lots of
O ring issues with all my seals until I could get the right ones for the
job.  I used this place in the UK for all the seals and they made me loads
of custom rings and cords.    For example, the normal through hulls should
have a 16 x 2.5 O ring.  Couldn't get the bar through.  16 x 2 felt like it
wouldn't seal.  16 x 2.35 went through fine and seals.  No leaks at all.

http://www.polymax.co.uk/

Regards
James

On 20 October 2014 01:03, via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hello Psubs group,
>
> I would like to ask the group where I can purchase an O-Ring for a 24"
> conning tower hatch ring.  I also need to mill the slot in the hatch ring
> and would like to know the width and depth of the slot.  I've heard some
> folks recommend a dove tail slot for the O-ring.
>
> Many thanks for your advise.
>
> Mark...
> _______________________________________________
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> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
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