venturi burner question

[donnymac250]

Originally Posted by Hurley

Ok, there was a 1.5" to 3/4 reduction on the burner. All I could get in black iron was a 1" to 3/4. Got to thinking this morning as I was cleaning this weekends mess up in the shop. Why couldn't I just get a galvanized reduction coupler in 1.5"? I mean there is no heat on that end and the pipe going into the forge is black iron. Maybe someone knows something I don't, which is very likely as I don't know much.........lol

i also have a cast metal reducer 3/4 t0 !" . will that not work alone ?

[Ray Rogers]

I'm not sure what you mean by 'alone'. A fair part od whether or not it might work depends on the overall design of the burner. Personally, on my Dirt Simple burner - which is pretty darned simple - I prefer a 2:1 ratio although I have no reason tho think that any other ratio would fail completely. USA Knife Makers has a simple venturi that actually has no venturi at all but appears to work just fine ...

[Hurley]

Yes Ray, my new forge from them has no venturi, just a piece of pipe with the gas nozzle centered about 1/4" away from the end and it works fine. Though it does start to sputter about every 10 min and I have to adjust the regulator. It may be that my gas is almost gone too. But it get REAL hot! Past forge welding temps!