sievert cyclone burner

Hi, I'm thinking of getting a sievert cyclone burner for silver soldering stay heads inside a firebox. I've done them successfully in the past with the ordinary sievert torch and the back of the firebox left off but the boiler I am thinking of making has a narrow firebox and I've read that the cyclone burner is better because the flame does not go out inside the box. Has anyone any experience of these?

Probably true, John ... 'though I have no experience of using them inside box.

They are certainly very effective for their intended purpose of wrapping the flame around a pipe.

[assuming that we're talking about the same burner]

MichaelG.

Not used one myself, but I have a friend who has used one for just the reason that you say on boilers that he has made. He finds it very satisfactory AFAIK.

Your requirements are precisely those circumstances that the cyclone is designed to meet

Alternatively, use an oxy-acetylene torch.

It's a no brainer!

Keith

Hi thanks for replies. I was wondering if the sievert 3524 will be adequate or whether I will need the larger capacity one. I will get the whole boiler up to near temperature first and I always use ceramic fibre to wrap as much of the boiler as possible so as not to lose heat.

I think the important thing about using a torch in a confined space is where the burner draws its air from, burners need to draw air from an area not in the confined space. Sievert make some burners that draw air from the base of a long tube and the gas air mixture burns at the end so it is not trying to burn the exhaust gases in the firebox.

Mike

All the cyclone burners I have seen do exactly that

Link

**LINK**

regards

keith

Hi Cup alloys, could you re-do me that link please . It doesn't work, says safari can't find it for some reason. Thank you..

Try this

I've always wondered if a standard burner could be converted to a cyclone by slipping a suitable tube over it to extend the distance between air inlet and the end ?

I'm pretty sure I've tried that and it didn't work. The flame just won't burn properly at the end of the extended tube.