I use an Orca torch, also known as the EZ torch.
It is a propane/ air torch and can be set up to run on a 1 pound
disposable propane bottle or, with a different regulator, on a larger
20 or 40 pound bottle.
I use the 1 pound propane bottle as it is safe to use in my home
The torch does not create a very precise flame, but with practice it
can be used for many different operations in silver work.
My current focus is filigree and the Orca torch is my go to torch
for 100% of my filigree work.
This is the link to the torch on the Otto Frei website.
When you order the torch you must specify whether you will be using
it with at 1 lb disposable propane tank or with a large refillable