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Old 09-10-2010, 04:36 PM   #1 (permalink)
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Default Welding tank regulators for co2

Has anyone tried using the regulators for welding tanks for co2 in aquariums,the reason I ask is because I can get one very cheap and was wondering if it could be adapted for aquariums.I would appericiate any help.
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Old 09-10-2010, 05:43 PM   #2 (permalink)
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Default Re: Welding tank regulators for co2

Hi shikari,

A welding regulator may or may not work. If it is a "pressure regulator" it is fine. If it is a "flow regulator" I would recommend that you keep looking.
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Old 09-10-2010, 06:10 PM   #3 (permalink)
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Default Re: Welding tank regulators for co2

If you really wanted to go that route, your better with a 2-stage, and one that has NOT been used with any gas other than CO2 or Oxygen (you wouldn't want any Acetylene residue getting into your aqaurium). Some of them can be converted over by changing out the nipple, but some can't. The Victor Two-Stage 250 series are an example of some good ones.

I'm going to forward you a PM I recieved from Left C on this very subject...
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Old 09-10-2010, 06:31 PM   #4 (permalink)
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Default Re: Welding tank regulators for co2

I just found these listed as pressure refulators.
Harris Model 601-15-200 Acetylene Regulator
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Old 09-13-2010, 07:25 PM   #5 (permalink)
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Default Re: Welding tank regulators for co2

You shouldn't use acetylene regulators as Dave mentioned. Inert gas, some O2, and air regulators are commonly and easily used for CO2 with just a nut and nipple change to a CGA-320. Regulators that have stainless steel diaphragms are great for the conversion.

You want to make sure that the regulator's pressure range is in our range too. The high pressure gauge may read from 0 to 3000 psi or 0 to 4000 psi. The low pressure gauge can range from 0 to 30 psi up to 0 to 200 psi. Pressures higher than this are for very large aquariums.

Here is an older regulator build that Rex wrote. It will show you how simple it is to build one. I can do it and I'm not a mechanic.
http://www.rexgrigg.com/regulator.htm
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Old 09-13-2010, 08:32 PM   #6 (permalink)
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Default Re: Welding tank regulators for co2

Something else to think about, most welding regulators do not have a very fine adjustment.
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Old 09-14-2010, 02:27 AM   #7 (permalink)
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Default Re: Welding tank regulators for co2

On my first co2 setup i had one co2 regulator



Its Messer, EU welding co2 one stage regulator and it worked preety well.
I hadnt needle valve, all regulation was done with that big black bottom knob and it was possible to have even 1 bubble per 10-20 sec.
Now i have beer regulator + swagelok.
Generally i recommend to go for beer regulator which are designed for lower pressures. My regulator have about 60 psi working pressure and that Messer had about 220 psi.

Beer regulators can be found in US for 40$, now it depends how cheap is that welding regulator
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Old 09-14-2010, 06:42 AM   #8 (permalink)
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Default Re: Welding tank regulators for co2

Quote:
Originally Posted by TAB View Post
Something else to think about, most welding regulators do not have a very fine adjustment.
That's what a metering valve is for.

Here's my Ebay special.

http://www.flickr.com/photos/h_bosma...7622829944660/

I won two regulators like that for $45.00 about a year ago. Unfortunately, it's getting harder to find bargains like that. I just keep the second as a spare just incase, I blow a diaphragm or something but, that's kind of unlikely in our application.

Last edited by bosmahe1; 09-14-2010 at 06:48 AM..
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Old 09-14-2010, 06:34 PM   #9 (permalink)
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Default Re: Welding tank regulators for co2

I just saw this one on Ebay:

http://cgi.ebay.com/WELDIT-TWO-STAGE...#ht_733wt_1120

So you guys are saying a beer keg one will do the job? There's a lot on Ebay and they're pretty cheap. I would think the usage pattern for a beer keg is different to that of an aquarium, unless you're always drinking not that that may matter of course.
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Old 10-31-2010, 09:04 AM   #10 (permalink)
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Default Re: Welding tank regulators for co2

Quote:
Originally Posted by Left C View Post
You shouldn't use acetylene regulators as Dave mentioned. Inert gas, some O2, and air regulators are commonly and easily used for CO2 with just a nut and nipple change to a CGA-320. Regulators that have stainless steel diaphragms are great for the conversion.

You want to make sure that the regulator's pressure range is in our range too. The high pressure gauge may read from 0 to 3000 psi or 0 to 4000 psi. The low pressure gauge can range from 0 to 30 psi up to 0 to 200 psi. Pressures higher than this are for very large aquariums.

Here is an older regulator build that Rex wrote. It will show you how simple it is to build one. I can do it and I'm not a mechanic.
http://www.rexgrigg.com/regulator.htm
Hi Left C,

If the delivery range is between 5 to 125 psi can we use it for our application ?
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