Gauges Hoses

How do you use an oxy-acetylene torch?

In my auto class we are going to be using it tomorrow. I want some more back round knowledge about it so I don't blow anything up. What are the steps to lighting it and turning it off?
Thanks !

Ok, here's the basic start-up for a torch. 1. back off the regulators 2. crack open the torch valves to relieve any residual pressure all four gauges should now read zero. 3. open the acetylene tank valve 1/4 turn open the Oxygen tank all the way. the gauges closest to the tank valves should indicate the tank pressure the gauges closest to the hose going to the torch should not move, if they do, back off on the regulator and start over. 4. with the torch valve open 1/4 turn, screw in the Acetylene regulator until the gauge (hose side) shows about 5psi. shut the torch valve. 5. now do the same with the oxygen side except set the torch regulator to about 10-15psi. 6. crack open the acetylene valve on the torch and light it with the sparker then open the oxy valve and adjust the flame.

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