Hi Ric,
I was using the 3/4" burner on a nearly empty propane tank at what my old acetylene regulator gauge said was a bit over 0.5bar. I opened the tank tap and only turned the regulator a little and that was enough to create a hotspot 6"x 5" x 9" for me to forge the mild steel sheet elements I was working on. How accurate the gauge was is open to question but it was very low pressure and it made a lot of heat. I guess 5 bar would be absolutely raging hot!.
One question I did have was about the Jet Size that Tim suggested " 1/2" injector: 30 jet, 3/4" injector: 60 jet, 1" injector: 120 jet."
The Amal website says the 1/2" is Amal gas jet number 70, the 3/4 number 110 and the 1" number 180. Should I ask Amal for some smaller jets or am I getting confused somewhere?
Thanks.James