! WARNING
! WARNING

Portable Oxy-Fuel Welding and Cutting Outfit

Set-Up (Cont.)

CHECKING FOR LEAKS

Inspect the system for leaks before every use as follows:

1.With system purged, close both gas cylinder valves.

2.Turn both regulator adjusting screws counter-clockwise to stop gas flow.

3.If the high pressure gauge reading drops, there is a leak in the cylinder valve, inlet fitting, or high pressure gauge. If the low pressure gauge drops, there is a leak in the torch handle valve, hose, hose fitting, outlet fitting or low pressure gauge.

4.Use an approved leak detector solution to check for leaks. If the high pressure gauge drops, and at the same time the low pressure gauge rises, there is a leak in the regulator seat. Have a qualified technician repair the regulator.

Operation

hissing or squealing noise. If flashback occurs, close the torch handle valves (oxygen first), IMMEDIATELY. Flashback generally indicates a problem that should be fixed. A clogged tip, improper functioning of the valves, or incorrect acetylene/oxygen pressure could lead to flashback. Be certain to find the cause before relighting the torch.

1.Open torch fuel valve one quarter turn. Click spark lighter in front of torch tip to ignite the fuel gas. Point the flame away from persons, cylinders, or other flammable materials (see Figure 14).

continue to adjust the preheat oxygen until the preheat flame is neutral again.

Shut Down

It is important to follow these instructions exactly as shown to prevent equipment damage.

1.Close the torch oxygen valve.

2.Close the torch fuel valve.

3.Close the cylinder valves to both gasses.

4.Open the oxygen torch valve to bleed off all oxygen.

5.Close the oxygen torch valve.

6.Open the fuel torch valve to bleed.

7.Close the fuel torch valve.

8.All pressure gauges should read

0 PSI. Turn both pressure adjusting screws counter-clockwise (no flow).

Lighting Torch

NOTICE

The following

instructions are for

 

acetylene gas use only. Contact your gas supplier for instructions on the use of other fuel gases.

Before lighting

the torch, follow all

personal and equipment safety regulations. Wear filtered protective eyewear (shade 5 minimum) to protect the eyes from heat, sparks and hazardous rays of light produced by the flame. Keep work area well ventilated.

BACKFIRE AND FLASHBACK

When the flame goes out with a loud pop, it is called a backfire. Backfire can be caused by (1) operating the torch at lower pressures than required for the tip used, (2) touching the tip against the work, (3) overheating tip, or (4) an obstruction in the tip. If backfire occurs, shut off the torch handle valves (oxygen first) and after remedying the cause, relight the torch.

A flashback is a condition that results when the flame flashes back into the torch and burns inside with a shrill

Figure 14 - Igniting fuel gas

Never use matches

! WARNING to start torch as initial puff of flame may burn hands.

2.Adjust the torch fuel valve until the flame stops smoking and leaves the end of the tip about 1/8”, then reduce slightly to bring flame back to tip.

3.Open the torch oxygen valve (for cutting attachment, open preheat valve ) until a neutral flame appears (see Figure 15).

If you experience a backfire or

flashback (a hissing sound caused by the flame burning inside the mixer area), IMMEDIATELY turn off the oxygen torch valve. Then turn off the fuel valve. Follow shut down procedures and allow the torch to cool before use. If trouble persists, contact a qualified technician.

ADDITIONAL ADJUSTMENTS FOR CUTTING ATTACHMENT:

4.Depress the cutting oxygen lever. Note that the preheat flame may change slightly from neutral to a carburizing flame with a feather.

5.With the cutting oxygen flowing,

PURE ACETYLENE FLAME

Inner Cone White

Bluish to

 

Orange

Nearly Colorless

 

CORRECT NEUTRAL FLAME

One-to-one mixture of gases

Inner Cone White

Nearly

 

 

Colorless

Bluish to Orange

 

OXIDIZING FLAME

 

Too much oxygen

 

Acetylene

 

Feather

Light

Inner Cone

 

Orange

White

 

CARBURIZING FLAME

Too much acetylene

Figure 15 - Acetylene Flames

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Campbell Hausfeld WT5000 Operation, Shut Down, Lighting Torch, Checking for Leaks, Backfire and Flashback