The Craftmans Shop > New from Old
Resurrection of a CFEI 100 KVA Induction Furnace
awemawson:
Various bits of plumbing arrived this morning allowing me to connect the Ceramic Chip Forge to propane. The 8 mm flexible gas pipe had perished, and goodness knows what happened to the female quick disconnect wall fitting so this is what I had had to order.
The gas cylinder is one I brought from Bromley 13 years ago and still has a little left - it's a 47 kg cylinder (tare 40 kg) and my bathroom scales say it now weighs 56 kg so 16 kg of gas left.
Finally the cylinder will be permanently fitted in the Cylinder Cage that I made last year, but to avoid drilling holes in the wall just for a test I brought it into the foundry.
To my amazement all seems to work, but I need to find out some how what delivery pressure it expects. It has a pilot light like a bunsen burner on the end of a pipe, a blown air / gas torch on pipes that are far too stiff for comfort, and of course the forge itself which is rated at 22 kW.
It lit up OK and I tweaked the gas pressure to a flame that looked reasonable and let it cook. Ten or fifteen minutes later I had some 1/2" bar glowing at a nice forging temperature :ddb:
So it just needs a permanent site and fixed plumbing, though I am very tempted to leave it on it's wheeled skid for flexibility.
awemawson:
Well it helps to read the rating plate - 20 mBar !
It is marked for 'natural gas' ie North Sea Gas but I can't remember if it had been converted to propane or if I found it satifactory without conversion. BUT I did find a record of correspondence that I'd had with another shed dweller describing the difference in size of the jets so I must measure them at some time.
hermetic:
www.flamefast.co.uk, theyre still in business, and apparently expanding! That forge looks very good, and fast......and smokeless! Lucky man!
Phil
tom osselton:
I’ve got this chart if it’s any use to you.
russ57:
Never seen such a thing.
Propane forges are very handy, but often challenging to fit anything other than straight bar.
How hot can it get?
-russ
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