[PSUBS-MAILIST] CO2 scrubber BOM or documentation

Fri Mar 29 19:59:14 EDT 2024

Hatch considerations are specifically addressed in Section 11.5 of the ABS Rules for Building and Classing Underwater Vehicles, Systems, and Hyperbaric Facilities (2024).

Structurally, hatches should be designed in accordance with the guidelines for pressure boundary components in that document (i.e. the various approved head and shell geometries, or unstayed flat heads per the Steel Vessel Rules) for the appropriate design working pressure, and windows in hatches are subject to the same rules as windows in the hull shell. Reinforcement of a hatch seat opening, as with a window seat, should add, at minimum, an equal area of material as was removed from the hull shell for the opening. Acrylic windows may not be considered as load bearing through the opening, but metallic hatches may be if the stresses are carried through the interface without discontinuity / offset. Dogging mechanisms should permit the hatch to withstand a minimum of 1 atm overpressure in the unseating direction without compromising the hatch seal.

Sean
-------- Original Message --------
On Mar 29, 2024, 17:32, Jefferson Tortorelli via Personal_Submersibles wrote:

> I am curious is there a source for hatch design and fabrication?
>
> Jefferson Tortorelli
>
> Tortorelli Creations
>
> 4910 Santa Anita Avenue
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> El Monte, CA 91731
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> Cell: 909-908-3795
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> Shop: 909-370-3131
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> Website: www.Tortorelli.com
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> From: Personal_Submersibles <personal_submersibles-bounces at psubs.org> On Behalf Of Cliff Redus via Personal_Submersibles
> Sent: Thursday, March 21, 2024 5:56 AM
> To: via Personal_Submersibles <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] CO2 scrubber BOM or documentation
>
> Yes Emile, this is a radial blower. The direction of flow in axial intake but radial centrifugal exhaust.
>
> Some people refer to these as squirrel gage blowers. I was looking at my files and can't put my fingers on the datasheet for this blower but see Papst RL90-18/14N which is a newer version of this blower. https://www.onlinecomponents.com/en/datasheet/rl901814n-12103307/
>
> Cliff
>
> On Thursday, March 21, 2024 at 05:02:51 AM CDT, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Hi Cliff,
>
> It is a Radial blower right? These ones create a higher pressure than axial blowers.
>
> Br, Emile
>
> Van: Personal_Submersibles <personal_submersibles-bounces at psubs.org> Namens Cliff Redus via Personal_Submersibles
> Verzonden: donderdag 21 maart 2024 00:17
> Aan: Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org>
> Onderwerp: Re: [PSUBS-MAILIST] CO2 scrubber BOM or documentation
>
> Jon, see the attached drawing of the scrubber I will be using on the R400. It is essentially the same configuration I use on the R300. I have had good luck with the Rapst RL90-18/24 Fan Blower. These come up on eBay often. You can get this used on eBay for $39 now. These are good German-engineered blowers that seem to strike a balance between adequate head, and not to much current draw so that you can meet the 72-hour ABS rule and they are quiet.
>
> [System Papst RL90-18/24 Chassis Fan Blower | eBay](https://www.ebay.com/itm/166627017147?itmmeta=01HSF1VY7SQC0FXXSA1F8GFPY9&hash=item26cbbe81bb:g:9j8AAOSw5mRl445B&itmprp=enc%3AAQAJAAABANFh3hHCtU6fs6Dbl0441LWpWWR%2F43mbpX4QOpkamKEuu8wcafqqXiLuT2kQ%2BXzfeEa5SqdPhSyU4mVxszfc67keiNZsobJDZFkLeD2qYIaPRzfcVo--DQpAb4KzXph0QyW%2BJdyA%2FLnVjyv5il0kPgB6Mrd3HUuc1usfOI3kE3rrfrw1%2FTu408WUHU17DIMcWzyqx8r%2Bg6QWHCojrZBFhfj%2BJ8UY3ZOk%2BRPQqJk94OtudAYc9QeQLFSIcuLcfrE%2BUOJ4fdtttU9Hj9MsNiEEx5iGAS%2BuA%2FYKHyckSzhpoqgDhmRqYzLq%2FsHYIwVGLd2W3dYAjx27zATOCHZoUQVxoPc%3D%7Ctkp%3ABFBM_OPv4ctj)
>
> Cliff
>
> On Wednesday, March 20, 2024 at 01:21:01 PM CDT, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Hey guys, I'm in the initial thought processes of CO2 scrubber design and really don't want to reinvent the wheel on this component. Are any of you willing to share some details on your design? I know Alec submitted a 3D printer design which we have on the website however I don't have access to a 3D printer and frankly even though I've spent 40+ years in software development and can modify a UNIX kernel, my CAD skills are pretty much non-existent.
>
> For this component I'd really like something that can be built with as many off the shelf parts as possible. Any suggestions?
>
> Jon
>
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