Complete, with the alloy exhaust block and the correct guard, but with some jobs to do. ‘Worst first’ is my general rule for fettling and it was an unsuitable exhaust pipe - a piece of copper 15mm plumbing pipe. A bodge that evidently worked, but a push fit into the burner left it prone to pop out at any time. My good fortune it didn’t, and in the process lose the aluminium block a push fit on it. Lead soldering the copper pipe to the burner was a no-no (burner temperature would melt the solder). The temperature for ‘hard’ soldering (silbrazing) would melt the copper pipe. Solution was to silbraze a brass tube in its place. Alloy exhaust block a push fit on it. Good to have the distinctive priming cup. This was my home-made take on it for THIS later model bowl fire. I’ll post on the rest of the project as I progress. John
Silver-flo 55 rods coated with flux - which I prefer for the convenience of not having to make up a flux solution beforehand. 630-660 degrees C melt apparently. In terms of the melting point of the braze metal and the margin of safety for repairs to stove/lamp burner components, over on CCS I conducted a series of experiments with a thermal imaging camera to determine temperatures reached by a variety of stove burners. Here is the result for a Coleman Handy Gas Plant, 435 degrees C at the hottest point.
Thanks John, that is useful to know That thermal picture is interesting?..Does it really say that the blue flamelets are only 435 celsius?
Strictly speaking, the blue flamelets themselves will be cooler because they're unburnt gas/vapour. Maximum temperature will be in the area surrounding the blue flamelets where the gas/vapour is actually burning i.e. an exothermic reaction. Remember your 1st year Science lesson on the Bunsen burner...
That’s right. It figures, a silbrazed jointed piece of metal held in that flame wouldn’t part, though it would get red hot. In the direct flame of this large Optimus paraffin blowlamp, it’d melt (764C).
Yes, Silver solder rods, they always were pricey.. :-( I remember my old boss saying he kept his in the airing cupboard..Why? 1. To stop moisture spoiling them... 2. To prevent us from using them...
