1. Oxy – Fuel Torch
Ag Mechanics

2. Equipment: Oxygen Cylinder Acetylene Cylinder Pressure Regulators
Oxy-Acetylene hoses
Torch Body with Cutting attachment
Correct Tip

3. Equipment Cont.. Cutting Goggles Safety Glasses Striker
Check Valves or Flashback Arrestors.
Proper Clothing

4. Oxy-Acetylene Hoses. COLOR CODED: Red= Acetylene (Flammable)
Green = Oxygen

5. Oxygen
Oxygen-
a colorless, odorless, tasteless gas that is heavier than air. Oxygen alone will not burn, but when mixed with other combustibles it becomes highly explosive.

6. Oxygen is stored as a compressed gas in a steel cylinder to a pressure of 1,800 to 2,200p.s.i.
Turn Cylinder valve open completely

7. Oxygen Regulator Right Handed Threads
Regulator has Female Connection, Cylinder has Male Connection
Working pressure between 20 and 60 psi
We (Ag mech) will use 20 psi

8. Acetylene
Acetylene-
is colorless, but has a very distinct odor. This gas is compressed to a pressure of 250 p.s.i. It is composed of carbon and hydrogen.
Turn Cylinder Valve 1/3 or 1/4 turn open.

9. Acetylene Regulator Left Handed Threads
Regulator has Male Connection with “V” groove, Cylinder has female Connection.
Acetone is added as a Catalyst.
Working pressure between 2 and 10 psi
Tank pressure, 250 psi
We use 5 psi

10. Oxygen & Acetylene Cutting
Is a process used to separate metal by heating it to a melting point, somewhere between 1,400 and 1,800 degrees
The metal is then oxidized and blown from the kerf with a stream of pure oxygen

11. Oxygen Acetylene Safety
Oxygen supports combustion
Cylinders are necessary but can also be highly dangerous
Always cap bottles in transport
Cylinders can explode

12. Oxygen Acetylene Safety Cont..
5. Acetylene bottle should be emptied at a rate of 1/7th capacity per hour or less
6. Flames can reach 6,300 degrees F
7. Bottles should be stored in a vertical position at all times.

13. Cutting Tips Tips are sized by metal thickness
Adjust pressure to fit metal
Cone of flame does not touch metal
Popping tip means:
too close, not enough oxygen, too hot, or dirty tip

14. Three
Types Of
Flames

15. Carburizing Flame Excess acetylene Lack of oxygen
Used for soldering & hardsurfacing
                                               

16. Neutral Flame Correct oxygen Correct acetylene
Used for cutting, welding & heating
                                               

17. Oxidizing Flame Excess oxygen Lack of acetylene Used for brazing
Usually has a whistling sound