More information on what you are trying to do would help. Propane will
work for silver brazing and for brazing copper with Silphos. The size
of the object makes a big difference as well as using insulating
firebrick or something to keep the object from losing heat.

Dan




wrote:
I could weld once - about 50 years ago - but have lost the art. I now
need to do some brazing, but cant justify expensive kit.

Here in the UK there a lot of plumbers torches, and you have to be
careful about getting the right one for brazing. MAPP gas is OK
apparently, but costs an arm and a leg, so I want to stick to propane.

It appears that propane torches running at about 4 bar get hot enough
without an air supply. Does any one know if this is correct please?
What are the respectable makes? Rothenberger seems to be around a lot.
What about Silverline or Bullfinch??

Any ideas welcome.

David B.