[PSUBS-MAILIST] K-250 paint

[Philippe Robert via Personal_Submersibles]

 Thank you for all of your's advice !


Le ven. 30 avr. 2021 à 12:04, via Personal_Submersibles <
personal_submersibles at psubs.org> a écrit :

> Here's some practical stuff if you've never done this before. Paint the
> hatch. Make sure it's sufficiently protected. Pay special attention when
> painting the groove itself. You don't want too much build up, especially in
> the inner corners. Once the paint has cured, put on a sweatband and apply
> elbow grease to the o-ring groove using  fine grit sandpaper. Do it by
> hand. What you want to do is work/sand/polish the paint down to pretty much
> its minimal thickness without breaking through to the undercoat (or not
> much, anyway). If you think the sanding has thinned your paint coating too
> much, then wipe the groove down with solvent, thin a little more paint in a
> paper cup, and add a layer back to the groove with an artist's brush. Let
> it hard cure again. Then get the sandpaper back out. You are looking to
> have a very smooth surface in there. You'll get a matte finish, rather than
> shiny, which will help hold the grease if nothing else. You can't depend on
> the original application for smoothness. Once she's slick to the touch,
> clean carefully, and apply a little of your favorite o-ring grease. Then
> grease the o-ring and install. You're done. It doesn't hurt to pull the
> o-ring if the sub will be laid up between operations. Wipe with a very
> clean cloth. Re-grease groove and o-ring using your bare hands so you can
> feel any grit that might have been picked up. The sanding really isn't that
> big a job on the bench, but it needs to be done, and carefully. Once you
> get to that point, all you have to do is keep an eye on things, close the
> hatch, and go diving. All the Perry boats had painted o-ring grooves and
> Monel mating surfaces, and all of them got the extra elbow grease to polish
> those grooves to a fair-the-well. Never had one leak. Ever. And because we
> were fussy about the maintenance, I never saw a speck of rust in there,
> even after a hard season. Pretty good results for half an hour's work on
> the bench.
> Vance
>
>
> -----Original Message-----
> From: hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org>
> To: Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org
> >
> Sent: Fri, Apr 30, 2021 9:00 am
> Subject: Re: [PSUBS-MAILIST] K-250 paint
>
> Yes you can paint the groove, but make sure the groove volume is still
> sufficient for the o-ring plus appropriate percentage.
> Check Parker O-Ring groove design chart.
> Hank
>
>
> On Thursday, April 29, 2021, 08:37:59 PM MDT, Jon Wallace via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Yes.  Obviously make sure you have an even coat.  The K-600 o-ring groove
> is painted.
>
> Jon
>
>
>
> On Thursday, April 29, 2021, 08:19:24 PM EDT, Philippe Robert via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Is it suitable to paint the inside of the oring groove?
>
> Le jeu. 29 avr. 2021 8 h 05 p.m., Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> a écrit :
>
> <http://www.psubs.org/design/paint.html>
> http://www.psubs.org/design/paint.html
>
> PSUBS.ORG
> <http://www.psubs.org/design/paint.html>
>
>
>
>
>
> On Thursday, April 29, 2021, 06:32:47 PM EDT, Philippe Robert via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi all,
>
> I was wondering what kind of paint I can use for the conning tower
> sealing hatch. Did you use special stuff in the O'ring groove of the hatch ?
>
> Regards
>
> Philippe
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