[PSUBS-MAILIST] air compensation

Tue Aug 1 12:25:20 EDT 2023

I have a local supplier for Tescom (Zimco Instrumentation), but my RFQ would come back with our industrial contract price in Canadian dollars, so maybe not relevant to the group at large.

Sean

-------- Original Message --------
On Aug. 1, 2023, 10:17, Cliff Redus via Personal_Submersibles 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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