View Full Version : Liquid fluxing

08-05-2008, 06:41 AM
Hi Guys i am looking for a liquid fluxing unit or information on liquid fluxing for brazing the trade name "Vapaflux" is one that i have seen. Yes i know a unit is still been made in the US, any body know of some thing in OZ.


08-05-2008, 08:48 AM

This might help.


Total Tools and British Oxygen Corporation - BOC - (ex CIG) might assist. Both are very good.



We have metal suppliers here that would have it or could get it in - but they are "Trade" suppliers and fabricators as well.

08-05-2008, 09:19 AM
The above site probably has the most information on brazing and braze welding. It might be of some help.

Also you can always try what jewelry metals workers do and that is mix powdered or solid flux which has been dissolved in water or alcohol or a mix of the two and painted on then dried by the torch.

08-06-2008, 03:55 AM
Have spoken to BOC and yes they can supply the flux but Comweld is long gone, here is a link to the US made unit http://www.gasflux.com/ if you want to see what i am talking about, i would like a unit here in OZ or can i make a unit? has any one experance with its use?


08-06-2008, 06:18 AM
Interesting more a gas carried flux rather than a liquid applied flux, Disregard my other post:D

08-06-2008, 12:49 PM
Yeah...no wonder everyone was confused--the original post asked about a liquid fluxing agent. That is a gas injected with the fuel gas and not the typical liquified or "pasteified" brazing flux applied to the filler rod or work:D

Sounds like a neat idea for production work, by the way.


08-06-2008, 04:48 PM
Here is one I was working on,


I used an oxy cylinder from one of those junk oxy/propane setups. Those are gas fittings that I brazed on.

The gas comes down the tube and bubbles up through the liquid flux and out to the torch.

This link shows the basics,


What it doesn't show clearly is the adjustable diverting valve needed to not only adjust the gas/flux mixture with straight gas, but to purge the torch when your done or not using the fluxer.

The site gives the formula and ingredients for the flux. Some minor nasty stuff. Nasty enough to cause me to rethink the need for such a thing. It's the long periods of non use that worry me.

However if you think you have a need for such a system, they are fantastic.

If you happen to try and build one, or buy a commercial one, please post your results over in the new welding area.

09-01-2008, 05:59 AM
I have found a source for the Liquid flux but not a unit, looking at the Jet flux unit is the valve at the top only a bypass or does it control the flow of flux into the gas? What are the dimensions of the unit? Sizes of the tube? How much flux is in the unit? Would it be possible to make a container with a tube going to the bottom for the gas to bubble through And not bother with the by pass? Any thing critical in its manufacture.