CGA Fittings - 110? 180?

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Tom McCarthy
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CGA Fittings - 110? 180?

Post by Tom McCarthy »

Trying to figure out how to get a Victor VTS 450 Series regulator connected to a Sigma Aldrich deuterium can (when purchased).

Now, the regulator has a CGA 350 connection, which seems to be standard and appropriate for deuterium (from table: http://www.sisweb.com/referenc/tools/cgafitt.htm). My problem is in the Sigma Aldrich product description, which says the deuterium bottle has a CGA 110/180 connection - I'm taking that to mean either a CGA 110 or 180 connection...
Standard products are packaged in a 450 mL carbon steel lecture bottle with brass CGA 110/180 valve
The recommended regulator has a CGA 180 inlet.

That's all good except I can't find anything substantial documentation about CGA 110, or 180! Nothing mentioned here (http://www.concoa.com/cgachart.html), only thing I can find are drawings (http://www.asge-online.com/pdf/ASGEpg187.pdf), which don't provide any more info on the connections than what they look like. I can find a CGA 110 to 180 adaptor, but not much more, which is not helping me get to where I want.

I'm looking for a way to adapt from the deuterium bottle to the regulator, CGA 110/180 to CGA 350. I may be searching for the wrong thing, but I can't find an adaptor anywhere. If anyone has an idea of how to bridge the gap, please shout! Scott Moroch suggested that I may be able to completely remove the CGA 350 from the Victor regulator and replace it with a 110 or 180 fittings, but I'm not confident in that at the moment as I don't have a clue as to if that's safe, or will work and be feasible.
Regulator Datasheet
Regulator Datasheet
Victor VTS 452D Regulator
Victor VTS 452D Regulator
Tom
Jim Stead
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Re: CGA Fittings - 110? 180?

Post by Jim Stead »

CGA 350 is standard on larger bottles, lecture bottles use the smaller CGA 180/110.

The CGA 350 fitting on your your regulator most like unscrews from it, and it's likely to be 1/4 or 1/8 NPT. All you need to do is get a CGA 180 or 110 fitting to replace it. The 180 is the external thread on the bottle, the 110 is the internal thread. Google "CGA 180 fitting" or "CGA 110 fitting" for some options.
https://weldwarehouse.com/cgi-bin/einst ... :312=180-3
http://www.ebay.com/itm/SS-Lecture-Bott ... 1622817852

Edit: I found the PDF for your regulator here - http://victortechnologies.com/IM_Upload ... lators.pdf
You can see how the inlet is threaded into the body. I looked up the part number for one of the inlet options and it showed it as 1/4-18 NPT. So, find a 110 or 180 fitting in 1/4 NPT and you should be good to go.
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Rich Feldman
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Re: CGA Fittings - 110? 180?

Post by Rich Feldman »

Hi Tom.
The lecture bottle fittings were discussed a while back in this thread: viewtopic.php?f=46&t=10390&p=69181

Changing the nipple on a regulator is (in many cases) like changing the plug on an electric appliance, for use in a different country with the same voltage but differently shaped outlets. Hydrogen is pretty benign, with no special requirements for materials it touches in the regulator. Here's a CGA 180 nipple. Nut and gasket washer sold separately.
WES180-3.jpg
from http://westernenterprises.com/enterpris ... t-nipples/

If those little CGA180 nipples aren't available with 1/4" pipe thread, you could get one with 1/8" pipe thread & use a 1/8 to 1/4 threaded bushing at the regulator inlet.
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Jerry Biehler
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Re: CGA Fittings - 110? 180?

Post by Jerry Biehler »

The one exception is never, EVER, use oxygen in any regulator that has had anything but oxygen through it. If there was any hydrocarbon contamination at any time things could go bad very suddenly.
Tom McCarthy
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Re: CGA Fittings - 110? 180?

Post by Tom McCarthy »

That clears things up. I'll have a go at changing out the CGA fitting and hope that works out. That PDF is a valuable resource to have Jim, thanks for pointing it out, I'd come across the document but didn't think to check out switching the inlet swivels and on inspection it has a lot of info that I could need...Going to have a lot more respect for the value of technical drawings from now on.

Huh, missed that post Rich. A search for "CGA180" gives the thread, but the more obvious "CGA 180" doesn't give me anything. Guess I should've tried it out.
You must specify at least one word to search for. Each word must consist of at least 4 characters and must not contain more than 84 characters excluding wildcards.
Further investigation - looks like a forum bug. No error message for not searching by three letter words (which will not return results), but searching by, say, "cg" gives the above error message. Will report to the powers that be.

Thanks for the help Jim, Rich, Jerry.

Tom
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