[PSUBS-MAILIST] Pressure Chamber

Fri Dec 18 13:32:40 EST 2015

Thanks,painting isn't an option for me, as the end cap is a plugwith an o-ring round it, & is such a tight fit that I wouldn't even add a few microns of paint. To get it off I slacken the bolts, then add a bit of air pressure to move it.Alan

      From: James Frankland via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Saturday, December 19, 2015 5:12 AM
 Subject: Re: [PSUBS-MAILIST] Pressure Chamber

I painted mine also, then after the final weld, poured some paint in and rolled it around.  Not very scientific, but hopefully its covered.  
On 18 December 2015 at 15:46, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Yeah, you can just paint it.  I painted the inside of my forward hard ballast.  I left a 4" fitting where I was able to get my arm in after the final weld of the end cap. Brian

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Pressure Chamber
Date: Fri, 18 Dec 2015 13:33:36 +0000 (UTC)

Alan,   You can paint the interior, that is the simplest.   Fresh water is no big deal like salt water.  I like WD 40 for protecting bare steel in fresh water.  You might not like that on your parts though.Hank 

    On Friday, December 18, 2015 3:39 AM, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 I empty the tank before diving of course to save most of the stuff.  Only problem is its a bit slimy, so any left in the tank can slime up the underside of the boat on the first purge.  However, ive found that by purging the tank while driving forward gets rid of it without it glooping all over the hull.  Once its flushed though once, its all gone.
On 18 December 2015 at 10:14, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Thanks James,it looks good. Contains no solvents.I just looked it up & they sell it down here. 
Alan

      From: James Frankland via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Friday, December 18, 2015 11:02 PM
 Subject: Re: [PSUBS-MAILIST] Pressure Chamber

I fill my variable tank with liquid fluid film after dives which I am hoping is preventing the tank from rusting.   Its lanolin which is completely natural so can be pumped out into the sea next dive. http://www.fluid-film.com/ regardsJames  
On 18 December 2015 at 07:44, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Thanks Steve,that's not a bad idea regarding the liner.I'll head off to the plastics store with a tape measure.Cheers Alan

      From: Stephen Fordyce via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Friday, December 18, 2015 7:57 PM
 Subject: Re: [PSUBS-MAILIST] Pressure Chamber

Hi Alan,I leave water in mine permanently, but it's stainless so not such a big deal.  If you put additives in, you'll also have to make sure they're compatible with all the stuff you're going to put in it (ie. acrylic, seal material, etc.), I reckon that's probably more important that the unlikely chance of spontaneous explosions.
Alternatively, what if you made a kind of liner that could be filled with water and save the water contacting the pressure-containing walls?  Could be as simple as putting a plastic container inside, or a welded stainless steel tube with end disc.
Cheers,Steve
On Fri, Dec 18, 2015 at 3:10 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Sending this again as I didn't receive it. Hank, (or anyone)do you add an anti-rust solution to your water in your pressure test chamber?I was thinking of putting something like anti-freeze in the water in the test chamber& leaving the fluid in the test chamber permanently.I have heard that the gas given off by some liquids can be explosive under pressure.I think this would be rare, but if there is something safe I could add that you know ofit would be appreciated.Alan
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