[PSUBS-MAILIST] Scuba Tank DIN connector to JIC

Thu Oct 13 09:17:04 EDT 2016

300 is short for 300 bar, or the recommended maximum pressure of the fitting, indicating that it is a deeper thread than 200/232 bar fittings. The latter can be used with yoke style regulators (CGA-850) by using an insert in the female DIN on the tank valve. The 300 bar connection, being deeper, precludes this but is stronger. Similarly, if you have a 300 bar DIN fitting on your regulator, and screw it into a 200 bar DIN tank valve, it is compatible, but will show a couple of exposed threads which can be entrapment points.

DIN 477 is the actual thread specification.  Rarely seen in SCUBA equipment catalogs, but necessary if you're going to have a DIN thread machined.

Sean

On October 13, 2016 6:26:49 AM MDT, Mark via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>Thanks Steve,
>
>This is exactly what I'm looking for.
>(1/4" m NPT x DIN 300 m)
>
>Sean recommended a DIN 477 connector, is there a difference (DIN 300
>vs. DIN 477)?
>
>Lastly, I would like to regulate the air pressure to something more
>reasonable like 100 or so PSI.  Can you recommend an air pressure
>regulator?
>
>Regards,
>
>Mark Widman
>910-638-5229
>
>Sent from iPhone.
>
>> On Oct 12, 2016, at 10:27 PM, Stephen Fordyce via
>Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Hi Mark,
>> I have that sort of thing in my catalogue (TFM Engineering
>Australia), but being down under, not a lot of point sending them to
>you in the USA when you get can from the likes of:
>>
>http://www.northshorecompressor.com/products/17B477D22-M-NPT-x-DIN-300-M.htmlhttp://www.northeastscubasupply.com/search.php?search_query=DIN+NPT&Search=
>> 
>> You might be able to do a bit better if you look around - but avoid
>the ones with bleeders for your application in case it gets knocked.
>> 
>> Cheers
>> Steve
>> 
>> 
>>> On Thu, Oct 13, 2016 at 6:44 AM, Mark via Personal_Submersibles
><personal_submersibles at psubs.org> wrote:
>>> Hi Sean,
>>> 
>>> I have four SCUBA tanks mounted on the outside of the sub.  The
>SCUBA tanks are used to provide/control air for the external ballast
>tanks.  The air line runs from the SCUBA tank to a thru hull fitting in
>the sub (to a control valve) and then back out to the ballast tanks.  I
>need to acquire a connector from the SCUBA DIN to either NPT or JIC.
>>> 
>>> If I can order a DIN 477 to NPT that would suffice.
>>> 
>>> Regards,
>>> 
>>> Mark Widman
>>> 910-638-5229
>>> 
>>> Sent from iPhone.
>>> 
>>>> On Oct 12, 2016, at 3:15 PM, Sean T. Stevenson via
>Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> That's an oddball to find as a single piece, but you can certainly
>find male DIN 477 to e.g. NPT, and adapt that to a NPT/JIC.
>>>> 
>>>> What are you building?
>>>> 
>>>> Sean
>>>> 
>>>> 
>>>>> On October 12, 2016 12:49:50 PM MDT, Mark via
>Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>> Good afternoon, Psubs team:
>>>>> 
>>>>> Do you know if and where I could purchase a SCUBA tank DIN to JIC
>connector?  
>>>>> 
>>>>> Regards,
>>>>> 
>>>>> Mark...
>>>>> 910-638-5229
>>>>> 
>>>>> Sent from iPhone.
>>>>> 
>>>>> 
>>>>> Personal_Submersibles mailing list
>>>>> Personal_Submersibles at psubs.org
>>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>> _______________________________________________
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>> 
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>
>
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