How to Use a Cutting Torch (with Pictures) - wikiHow
May 07, 2021·In the same way that you closed the acetylene regulator, back the oxygen regulator gauge out a few turns. Once you’ve done that, turn the handle on the main oxygen tank so it’s all the way open. The setup on top of the oxygen tank will be similar to that on the acetylene tank. The oxygen valve is a double-seated valve.