CAUTION Open the acetylene cylinder valve approximately ¾ of a turn and no more Upon Completion of all Cutting Operations Shut off the 1. oxygen preheat valve. 8. Close the acetylene at the handle ; Do the same with the oxygen up to 5 p.s.i. After knowing how to use oxy acetylene torch, you can go for some serious or occasional metalwork. I've been using it for about 3 years but when I go to turn it off sometimes a small flame will stay for a few seconds then pop and disappear. 10. Acetone will damage the torch seals and can cause an unsafe condition. THE VALVES ON THE TORCH ARE TURNED OFF. If you shut the torch off by shutting down the oxygen valve first and then the fuel valve, if there is any issue with the fuel valve leaking, there will be a small flame left burning. Turn off torches after use: Close oxygen valve on torch. Open the acetylene needle valve no more than a ½ turn ; Light the gas with the striker held about 1 away from the torch tip. Adjust the acetylene valve to where the flame is touching the tip of the torch, but is not giving off black smoke. Turn the acetylene needle valve on the torch one turn ; Turn the acetylene regulator up to 3 p.s.i. It’s something that’s always been in the back of the garage gathering dust. Page 5 Be careful not to shut off the fuel valve first, this may create a "pop" type sound. Turn off the valve on the cutting torch for the oxygen first, then the acetylene. 2. Lots of guys run the acetylene way too low for using a rosebud. This process is simple and that is lighting, adjusting, using, and shutting down the torch. 5’ tall tanks, heavy duty stand, cutting torch and smaller welding/braising torch. Shutting the fuel off first will simply "blow out" the flame and not give any sort of indicator that the fuel valve is not completely shutting off. Turning off the Oxy-fuel torch 1. However Propane-compressed air won't work for cutting as it's the O2 that does the cutting---had our shop teacher demonstrate by doing a cut and turning off the Acetylene after it was started and finishing the foot long cut with only O2. turn off the oxygen valve on the torch handle. This blog entry outlines our recommendations for proper shut down of an oxy-fuel torch. 9. Several years ago, I inherited a professional Oxy-Acetylene setup. Turn your oxygen valve on all the way, then turn your acetylene valve a 1/6-1/5 of a turn. I'm in a welding college course and we use the acetylene torch to cut out pieces. In accordance with 30 CFR 56.4603, valves on cylinders shall be closed when the cylinders are being moved, if the torch and hose are left unattended, and when the task is completed. OXY-ACETYLENE We recommend closing the oxygen valve first whenever turning off an oxy-fuel torch system especially when Acetylene is fuel. Also lots of guys running a rosebud are often exceeding the withdrawl rate for the size cylinder they are using and pulling acetone up into the torch. I turn the oxygen off then the acetylene which is how my instructors taught me. We get this question a lot out in the field, and it's a good one. CAPTION 10. Using your striker light the torch facing away from you and the bottles. • If a flashback reoccurs, have the apparatus checked by a qualified technician before using again. 14 Turning on and lighting the flame . Turn the valves on the tanks to close them. OXYGEN IS ADDED TO THE TORCH. CAPTION 9. Close acetylene valve on torch. "Which gas do you turn off first?" Cutting Tips And Nozzles • Allow the nozzle to cool before using. Then, close the torch fuel valve. The oxy-acetylene torch is the key to knowing the Mystery of a simple flame that is produced with a blend of oxygen and acetylene. Then, turn off the fuel valve. 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