Read these instructions before using to become familiar with oxy-gasoline cutting torch:

I. System set up

1. Make sure the gasoline outlet valve and air release valve on the tank are closed.

Fill in the gasoline tank with ordinary gasoline in a gas station. Make sure the tank is not filled to the top. Maintain enough air space to permit tank pressurization. Fasten up the filler cap.

Note on gasoline:

Gasoline of any grade from a gasoline station can be used as fuel;

Not to use gasoline that has been stored for over 6 months, or is contaminated with impurities or moistures. Old or contaminated gasoline will not create a safety hazard, but will hinder the performance of the oxy-gasoline cutting torch.

2. Select an oxy-gasoline cutting torch and cutting tip according to the thickness of steel to cut.

Make sure the sealing slopes of the cutting tips are clean.

Fasten the cutting tip with a pair of wrenches.

3. Connect the fuel and oxygen hoses:

Fasten one end of the gasoline hose to the outlet valve of the gasoline tank and the other end to the gasoline inlet of oxy-gasoline cutting torch. Make sure both ends of the hose are properly fastened. Improper connection might cause the gasoline hose to loosen or detach during operation resulting in a hazardous and dangerous leakage of gasoline.

Connect the oxygen hose to the oxygen regulator and the oxygen inlet of the oxy-gasoline cutting torch.

4. Open the valve of oxygen cylinder. Adjust the oxygen pressure regulator, set the secondary gauge to the required oxygen pressure according to the task.

5. Pump the gasoline tank until the air pressure gauge indicates 0.05-0.1MPa ( （ 7.2~14.5 PSI ） ). The maximum pressure should not be over 0.2MPa （ 29 PSI ） .

II 、 Ignition

6. Open slowly the gasoline outlet valve on the gasoline tank.

If the gasoline valve is opened quickly there will be a distinct metallic click as the fast-flow ball check snaps into place and shuts off the fuel. If this happens, close the gasoline valve, lightly tap the side of the gasoline outlet pipe stem to reset the fast-flow check valve.

7. Purge the preheat oxygen line and the cutting oxygen line.

8. Open the preheat oxygen valve on oxy-gasoline cutting torch, oxygen should flow out from the cutting tip.

9. Ignition: Open the gasoline valve on the oxy-gasoline cutting torch. Increase the gasoline flow gradually until a mist sprays out from the cutting tip, and light it.

10. Preheat the cutting tip : by preheating the cutting tip a stable flame could be obtained.

Way of cutting tip preheating:

Reduce the length of the flame core so that the blue flame core burns in the cutting tip for 3-5minutes in a warm environment and about 5-8minutes in a cold environment. The flame should be blue during the preheating. If it turns red, increase the oxygen supply or reduce the gasoline supply.

11. Adjust the preheat flame:

Adjust the flame until it is balanced by opening or closing the gasoline valve and preheat oxygen valve on the oxy-gasoline cutting torch.

When the flame is blue, short and thin, it is oxygen rich and the flame temperature will be too low; when the flame is yellow or red with much smoke and perhaps gasoline dripping from the cutting tip, it is gasoline rich.

During operation, the flame core should be kept 3 -5mm pronounced and bright. The cutting tip will be destroyed from overheating if the flame core is too short. In the contrary, the cutting tip is under heated and gasoline does not atomize properly if the flame core is too much pronounced.

III 、 Cutting

12 ． When the preheat flame is ready, place the flame near the steel and preheat for 3-5 seconds. Open the cutting oxygen valve and start cutting.

IV 、 To Shut Down

13. Shut cutting oxygen valve on the oxy-gasoline cutting torch .

14. Shut gasoline valve of the oxy-gasoline cutting torch . Make sure the flame die s out .

15. Close preheat oxygen valve on the cutting torch .

16. Check to make sure the gasoline outlet valve on the tank is closed and the master valve on the oxygen bottle is closed.

Oxy-Gasoline Cutting Torch

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