Modify the characteristics of propane gas torches

I was challenged by the need of more thermal power of one of my propane torches to melt higher quantities of metal. Furthermore, I needed to modify the characteristics of the flame, to have a neutral flame to perfectly balance the available oxigen levels as well as carbon levels around molten metal.

The first change was quite straight forward: To increase the possible thermal output of the torch, higher volume of gas has to pass through the nozzle. My nozzle had a 0.5mm hole for the gas to exit. So enlarging the size by drilling a 0.55mm hole was – apart from the rather delicate work – not so much of an issue.

The second change required to modify the air flow. My nozzles generated a somewhat carburizing flame. Therefore the available oxigen was a bit too low. When higher amounts of air may be sucked in by the gas travelling through the nozzle, the flame gets more reduzing. So I opened the air holes by small amounts from each test to the next, until my desired flame characteristics was met…

This site uses cookies. By continuing to use the site (including navigation and scrolling), you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close