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Propane torch

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Stephen Follows12/03/2022 20:15:50
89 forum posts
3 photos

Can anyone recommend a decent propane torch for silver soldering please?

What's the best size of nozzle?

I'm looking for something that will fit on a standard tank of propane gas. Not necessarily cheap, would rather pay more and get a good quality piece of kit but that doesn't mean spending extra to look pretty!

JasonB12/03/2022 20:21:43
22744 forum posts
2653 photos
1 articles

Have a read of this thread from 2 days ago

roy entwistle12/03/2022 20:23:31
1525 forum posts

Sievert or Bullfinch

bernard towers12/03/2022 20:44:16
612 forum posts
109 photos

unfortunately the best size of nozzle depends on the size of the job, so a selection.

Huub12/03/2022 21:57:06
87 forum posts
13 photos

I have a sievert and that works well. The tip of the torch can be changed, I use a 22 mm (nr 394102) tip.

My torch was delivered without a pressure regulator. That can be very dangerous. If you nock over the gas bottle, not gas but liquid propane comes out of the torch and suddenly you have a flame thrower.

Tim Stevens13/03/2022 15:04:45
1598 forum posts

The best size for mending a 22ct wedding ring is the smallest, and if you want to melt the tarmac across your drive, the biggest. obviously.

Or, more realistically, it is the flame size and intensity which counts. So, work out what you will need to do with your outfit, and get a range of sizes. Not every one in the catalogue, but three, perhaps. And when you need something especially delicate, or beefy, consider adding another.

You are also limited by the size of the adaptors, the cylinder connection, the pipework, and - yes - the temperature. On a cold day, the gas (liquid in the cylinder) evaporates more slowly, limiting the max output.

And don't knock your cylinder over - it is not clear to me how a pressure regulator will stop liquid (at the same pressure) from flame-throwing.

cheers, Tim

Keith Hale14/03/2022 10:39:30
333 forum posts
1 photos

Hi Stephen.

Sievert will give you the best options for heating. These options are enhanced by using a variable regulator which allows you to to increase the amount of gas being burnt and increases the amount of heat generated.

This only applies to the 2000 series which is designed to run at 2 to 4 bar. The 2941 will generate between 7 and 14 KW of heat and is a good starting point.

If you want less heat, consider the 3000 series. The. 3941 burner that delivers about 3 KW with a more focused flame.

Heating is the most skilful part of a very simple process. If you want any more information on heating techniques then let me direct you to my book available from CuP Alloys or send me a pm.

Best wishes


Vic14/03/2022 10:47:33
3072 forum posts
8 photos

As said Sievert are good. Best prices I found were at:


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