[PSUBS-MAILIST] air compensation

Tue Aug 1 17:08:20 EDT 2023

Hi Cliff,

"The Tescom 44-4069 regulator would be a clean installation with just a
single 1/4 SS tubing run from the HP port of the 1st stage regulator to the
input port of Tescom 44-4069 regulator."

There's a little problem with this plan, though easy to work around. The HP
ports on regulators have a tiny orifice, in order to prevent rapid loss of
air if a hose or SPG fails. These ports cannot provide the sort of flow you
would want.

Best,
Alec

On Tue, Aug 1, 2023 at 12:17 PM Cliff Redus via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Sean, the specs do look good on this unit.  To me the issue is going to be
> the cost.  As background, the Parker regulator that Hugh, Alec and I have
> used for this application is the 364-02BSS/M1 Parker Watts Pneumatic
> Regulator.
>
> https://store.livhaven.com/r364-02bss-m1-watts-fluidair-pneumatic-regulator at
> $217.51.  I purchased mine off ebay for a fraction of this.
>
> When I had the Parker 364-02BSS/M1 installed for pressure compensating
> for my four MK 101s, it was connected to the LP port from my AquaLung Titan
> balanced diaphragm first stage regulator. I had the Parker 364-02BSS/M1
> adjusted to give about 2 psi over ambient.  I had the first stage set to
> 50 psi over ambient water pressure.  I use this for BIBBS and blowing the
> MBTs.
>
> The Tescom 44-4069 regulator would run directly off the HP air tank
> pressure then output go directly to thrusters.  It would be interesting to
> compare the Cv's for both regulators to get a feel on how much air flow
> rate they can provide to the thrusters descending and venting when
> ascending.
>
> The Tescom 44-4069 regulator would be a clean installation with just a
> single 1/4 SS tubing run from the HP port of the 1st stage regulator to the
> input port of Tescom 44-4069 regulator.  From the output port of the Tescom
> 44-4069 a single 1/4 SS tubing to a Swagelok Tee that branched off to two
> more "T"s to give four 1/4 SS tubing runs to the thrusters.
>
> We need to get a RFQ on one of these regulators.  Do you have a preferred
> supplier?
>
> Cliff
>
>
> On Monday, July 31, 2023 at 09:47:29 PM CDT, Sean T. Stevenson via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> I would be inclined to use a Tescom 44-4069 regulator for this purpose.
> Not sure what these sell for.
>
> Sean
>
>
>
> -------- Original Message --------
> On Jul. 31, 2023, 20:37, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> My original air competition for the R300 used the regulator that Hugh
> Fulton has on QSub.  These are pricey new but you can get them used on
> eBay.  I was operating all four of my Minn kotas 101 off this single
> regulator.  It was a special ss pressure reducing/pressure releasing
> regulator.  I had it installed on my last Florida dive which I went down
> about 100 ft .  Unit worked fine.  My first failure was on Flathead lake
> expedition in which one of my aft thrusters flooded.  After that I switched
> to oil compensation.  Alec is using same regular on his articulated arm and
> not the thrusters. He felt issue with the regulator was that the port for
> releasing pressure on ascent was too small.  I believe he has addressed
> this by adding a pressure release valve or OP valve.  He can elaborate more
> on his current strategy.
>
> Cliff
>
> Sent from my iPhone
>
> On Jul 31, 2023, at 9:14 PM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> John,
> I am happy with both air & oil.
> Am intending to fill my thrusters with oil, but have the oil pressurized
> off my air comp system. This will reduce air use to just whats in the lines.
> My electric manipulator will be air compensated off the same unit. Putting
> oil in it adds another layer of complexity.
> I think I need to put out a long video once I've finished this
> air compensator.
> From what I am hearing from Cliff, he didn't get enough air delivery from
> the single regulator he was using. However I thought this was the same unit
> that Alec is using & was now happy with.
> Alan
>
>
> Sent from Yahoo Mail on Android
> <https://mail.onelink.me/107872968?pid=nativeplacement&c=Global_Acquisition_YMktg_315_Internal_EmailSignature&af_sub1=Acquisition&af_sub2=Global_YMktg&af_sub3=&af_sub4=100000604&af_sub5=EmailSignature__Static_>
>
> On Tue, 1 Aug 2023 at 1:29 pm, Jon Wallace via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
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