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From: Roger Hayter <roger@hayter.org>
Newsgroups: sci.electronics.repair
Subject: Re: Re (3): Schrader connectors for medical air and nitrogen.
Date: 11 Jun 2024 15:59:29 GMT
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On 11 Jun 2024 at 16:34:10 BST, "peter@easthope.ca" <peter@easthope.ca> wrote:

> Roger & all,
> 
> In article <0631684948.b3e50d1b@uninhabited.net>, Roger Hayter
> <roger@hayter.org> wrote:
>> One reason for labelling them and keeping them separate is that the
>> oxygen one has to be kept free of inflammable lubricants etc.
> 
> Thanks Roger.  Helpful point.
> 
> I have a Hall neuro drill with the factory supplied hose visible here.
> http://easthope.ca/HallDrillHose.jpg
> 
> It's a hose within a hose; inner has pressure to drive the drill;
> outer is exhaust.  The upper connector in the photo connects to the
> drill.  The lower is the male Schrader which connects to the nitrogen
> supply.  The louvers next to the Schrader disperse the exhaust.
> 
> The manual instructs to drive with nitrogen.  A nitrogen bottle fitted
> with a regulator and female Schrader connector.
> 
> An employee at Bay Corporation commented that an air connector is
> sometimes used in this application. Implying that a Schrader male
> nitrogen can connect to a female air.  Would be interesting to know
> whether the air and nitrogen connectors differ in geometry or only in
> color and marking.  I couldn't elicit any additional details from Bay.
> 
> I can buy one of these female air connectors.
> https://www.ebay.ca/itm/261334401753
> It can thread onto a nitrogen regulator.
> 
> Bay offers a female nitrogen connector which I haven't found on eBay.
> https://www.baycorporation.com/products/schrader-style-quick-connects/nitrogen/scf-12-4
> 
> If someone knows of a vendor offering the nitrogen connector at a
> reasonable price, please let me know.  Otherwise
> I'll have to be satisfied with the air connector listed on ebay.
> 
> Thanks,                      ... P.
> 

It may or may not be helpful but idle googling led me to the following in a
2012 Mercury Medical connector catalogue:

"Important Industry Update:
For years Schrader adapters and check units were not manufactured with
nitrogen-specific indexing. In 2004, Schrader released such fittings which are
now
recommended for all nitrogen-driven products in place of the medical air
version
adopted by the industry for decades. Please use care when ordering."


It seems to mean you might have either, depending on age.





-- 
Roger Hayter