[PSUBS-MAILIST] Scuba Tank Purchase Questions

[Steve McQueen via Personal_Submersibles]

Thanks. Didn't realize yoke O-rings were such an issue. This changes my
mind on my valve choice.
Appreciate reviewing this topic.

Steve

On Thu, Feb 20, 2020 at 2:23 PM T Novak via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Just a case in point about DIN versus yoke, during the Flathead Lake
> expedition we blew two yoke O-rings on the Gama scuba tanks. It goes
> without saying that spare O-rings are a necessary inventory item to have on
> hand during sub ops.
>
> Tim
>
>
>
> *From:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *On Behalf Of *Cliff Redus via
> Personal_Submersibles
> *Sent:* Thursday, February 20, 2020 10:25 AM
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Subject:* Re: [PSUBS-MAILIST] Scuba Tank Purchase Questions
>
>
>
> Mine are aluminum for primary and I have a composite tank internal as a
> backup HP source.
>
>
>
> With a name like yours, you could not find a better boat name.
>
>
>
> Cliff
>
> Sent from my iPhone
>
>
>
> On Feb 20, 2020, at 10:57 AM, Steve McQueen via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> 
>
> Cliff, thanks. Good to hear about actual field issues. I will reconsider
> my thoughts a.ccordingly.  I have completed my contribution for Pisces VI
> and have refocused on finishing my project. Having your own compressor is a
> nice advantage. Are your MBT HP tanks aluminum or steel?
>
>
>
>  My K-250 is named "The Great Escape" (get it?).
>
>
>
> Steve
>
>
>
>
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>
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> On Thu, Feb 20, 2020 at 11:36 AM Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Steve, if it were me, I would go with DIN fitting on scuba tanks.  About 2
> years after I built my boat I had an O-ring blow while I was on the boat
> ramp ready to launch. If this would have happened during a dive, I would
> not have been unable to blow my MBTs by myself.  I would have had to have
> divers to manually inflate my MBT with open vent ports.  My experience is
> that most scuba shops can fill scuba tanks with DIN connections.  After the
> incident, I switched my MBT HP air supply to DIN values and have never had
> any trouble since then.  Also, last year I purchased a portable scuba
> compressor that came with an adapter to let you fill Yoke or DIN valves.
> Also this compressor is capable of filling a steel HP tank if I want to.
> To me, the real benefit of steel tanks with DIN connections is the ability
> to fill to a higher pressure.  If you don't need the higher pressure, then
> aluminum are lower cost.
>
>
>
> We are all looking forward to your sea trials for your lime green K250.  I
> love the paint job on your boat.  Has she got a name yet?  I am surprised
> you have had any time to work on your boat with the PLC work you been doing
> for Scott on his Pieces 6.
>
>
>
> Looking forward to catching up with you this year at one of the psub
> events.
>
>
>
> Best
>
>
>
>
>
>
>
> On Thursday, February 20, 2020, 09:54:59 AM CST, Steve McQueen via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
>
>
>
> All, getting ready to buy 2 scuba tanks for my K250. Just wanted to see if
> anyone had an opinion of my thoughts?
>
>
>
> 1) Choosing steel vs. aluminum (prefer its weight/buoyancy characteristics)
>
> 2) While I was wanting as much air volume as possible I decided against a
> HP version as I have heard most places won't (can't?) fill to that capacity
> anyway
>
> 3) Deciding on standard pressure steel 80s with K-valve (yoke fitting)
>
>
>
> I've been watching for a while (including Black Friday) but it seems there
> isn't much mark up and these tanks don't appear to go on sale.
>
>
>
> Thanks,
>
> Steve
>
>
>
>
>
>
>
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