The Bravo is designed to produce a wide variety of flame configurations so you can have the greatest versatility in your glass working. The flame is surface-mixed and operates without loud noise or flashback. Surface-mixed flames have the distinct advantage in that they are soft, quiet flames while producing a penetrating heat. Turning the precision needle valves easily changes flame settings. For best results, keep the fuel flow to a minimum. On Bethlehem Burners, loud noise does not indicate more heat. The soft, intense blue flame will bathe your work in heat which will quickly penetrate the glass.
For best results, you should light the gas flame first. Once you have the yellow flame close to the burner head, you can slowly add oxygen. As soon as oxygen is added, the color will change from yellow to blue. This indicates complete combustion. As you change the flame height you should always keep the flame color as blue as possible. The individual jets (small cones of sharp color near the burner face) should be kept from giving off any yellow “candles”. Yellow candles indicate unburned fuel. They are usually caused by the addition of too much gas, either by volume or pressure.
Unburned fuel will cause carbon deposits in the face of the burner. Keep carbon deposits to a minimum. If a deposit builds up on the burner face, you will overheat the front face, causing the burner to deteriorate. Carbon deposits will also change the flame characteristics of your burner. Use the stainless steel cleaning wire to remove all carbon deposits.
To extinguish the flame you should always turn off the oxygen before the gas. Do not over tighten the valves.
For more information about Bethlehem Burners visit our web site at: http://bethlehemburners.com