Cynic-al Posted March 14, 2016 Share Posted March 14, 2016 I've been given this, my plan was to rip the gubbins off and just use it with a blow lamp but now I've seen it I fancy seeing if it works. It's some sort of forced air brazing thing, looks as though it was on mains gas? My thought was to see if the pump runs, if it does I have a spare bottle of butane and a regulator so I thought I could rip the mains gas stuff off and put the butane regulator on and see if it works. Any advice? Quote Link to comment Share on other sites More sharing options...
miketomcat Posted March 15, 2016 Share Posted March 15, 2016 Insure your house well. I think there is a difference in jet for mains/bottle gas. Mike 1 Quote Link to comment Share on other sites More sharing options...
miketomcat Posted March 15, 2016 Share Posted March 15, 2016 Insure your house well. I think there is a difference in jet for mains/bottle gas. Mike Quote Link to comment Share on other sites More sharing options...
Maverik Posted March 15, 2016 Share Posted March 15, 2016 I'd just check it all over make sure the hoses look in decent Nick etc. and that there's no obvious potential to blow yourself up, but other than that it looks quite a simple set up. Quote Link to comment Share on other sites More sharing options...
Cynic-al Posted March 15, 2016 Author Share Posted March 15, 2016 Insure your house well. I think there is a difference in jet for mains/bottle gas. Mike Never mind the house it's the tools I'm worried about losing. I did wonder about jets, I know they're different on a domestic hob. Seeing as I have the stuff to try it I might as well see if it burns before I spend money on it though. I've no intention of running mains gas to the garage Good call i will check all the pipes and fittings first, anyone know mains gas pressure? I could pressure test it off the compressor first I guess. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 15, 2016 Share Posted March 15, 2016 Mains gas pressure is low ~20mBar. Is someone going to edumocate me as to how it works? I know "it brazes stuff together" but why exactly the pump etc? Quote Link to comment Share on other sites More sharing options...
pete3000 Posted March 15, 2016 Share Posted March 15, 2016 pump to add pressure to blue hose, so forced air and gas. To be honest it's a bit of a liability. I'd rip out the gas bits/motor/etc and use the stand with the fire bricks etc. Scrap the moving parts and buy an oxy/propane set for brazing. Pete Quote Link to comment Share on other sites More sharing options...
Maverik Posted March 15, 2016 Share Posted March 15, 2016 ^^^ I think I'd agree with Pete... much safer!... Quote Link to comment Share on other sites More sharing options...
Cynic-al Posted March 15, 2016 Author Share Posted March 15, 2016 That was the initial plan but I was intrigued Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 15, 2016 Share Posted March 15, 2016 So basically it sucks gas out using the passing compressed air stream? Therefore more heat...? Quote Link to comment Share on other sites More sharing options...
pete3000 Posted March 15, 2016 Share Posted March 15, 2016 not as far as i can see, the gas is at pressure already albeit fairly low. The air is compressed from atmosphere to produce a pressurised of air to be mixed with the natural gas which then combined burns hotter. A bunsen burner uses the gas to draw air from atmosphere into a tube to burn combined to produce the blue flame. This does effectively the same but the air is compressed to be mixed with the natural gas. However the whole thing could need an overhaul and regular safety check for blow back valves, cutoffs and the diaphragm etc. Probably not worth the faff, when you could buy a disposable set from screwfix. The hearth looks useful though, with some firebricks and heatproof sheets. Quote Link to comment Share on other sites More sharing options...
Cynic-al Posted March 15, 2016 Author Share Posted March 15, 2016 The hearth spins around too which is what I liked Quote Link to comment Share on other sites More sharing options...
Maverik Posted March 15, 2016 Share Posted March 15, 2016 Have a read of this... http://www.mig-welding.co.uk/forum/threads/what-is-this-called-some-sort-of-forge.35190/ Quote Link to comment Share on other sites More sharing options...
Cynic-al Posted March 15, 2016 Author Share Posted March 15, 2016 Interesting thanks Quote Link to comment Share on other sites More sharing options...
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