Classic cars forum & vehicle restoration.

[ukdave2002]

Hi

The oxygen regulator from my gas welder has started to play up; for about the first 90 seconds of use the regulation creeps and you constantly have to adjust the regulator, after that its fine.

This may not sound like a big problem, but as most of the gas welding/ brazing jobs I do only take 30 seconds or so, I'm wasting a huge amoumt of gas. Its a Butbro unit (see pic below) is there any known fix's or is it a case of replacing it?

Cheers

Dave

[Churchill Johnson]

First time i have seen this make have taken the BOC one's to bit's sound's to me like a sticky valve can this type be taken to piece's or is it sealed if it will dismantle then a good clean should do the trick, you might well know this no grease or oil! should be used.

[Calum]

All the welding kit I have used has done this - both my bottles certainly do anyway!

I always see that the problem is the pressure building up in the hoses, after the regulator. If the torch is turned off to set the other gas pressure, the pressure of the one already set then builds up in the pipes. Once the regulator flow and the flow through the torch are the same, it will stay nice and constant. I always close the bottles between welds, for this reason (and it's safer too of course)

That's how I have always seen it, and I just adjust as you say until it burns constant.