Hot-max-torches HTK-MD Manuel d'utilisateur télécharger pdf (Page 7)

KDAR Company 6

Operation

WARNING

At this point the operator should be wear-

ing appropriate protective clothing such as

gloves and goggles.

Lighting the Torch

1. Open the acetylene control knob on the torch han-

dle just enough to let some gas flow.

2. Holding the striker close to the welding tip

squeeze it a few times to create the sparks re-

quired to light the acetylene.

Note: A oxy-acetylene torch should NEVER be lit

with oxygen present in the mixture.

Adjusting the Flame

1. If the acetylene is set too high the flame will be a

few inches away from the tip. Reduce the amount

of acetylene by turning the acetylene control knob

counter clockwise.

2. When the flame is about 8—10 inches long and

only has a small amount of black smoke; begin to

introduce oxygen by turning the oxygen control

knob clockwise.

3. As oxygen is added the flame will turn from a

yellow-orange to a whitish color and flame will

have three distinct cones (Figure 1). This is called

a carburizing flame and is not hot enough for

welding.

4. As oxygen is added to the mix the acetylene

feather will shrink and disappear into the cone

(Figure 2). This a neutral flame and is ideal for

welding.

5. If additional oxygen is added the cone will be-

come shorter and fuzzy (Figure 3). This is a oxi-

dizing flame and will cause breakdowns in the

material being welded and the weld itself.

Figure 1

Heat Envelope

Acetylene

Feather

Beginning

of Cone

Figure 2

Figure 3

Heat Envelope

Sharp,

Bright Cone

Short Heat Envelope

Short, Fuzzy

Cone

Once a neutral flame has been achieved the torch

is ready for welding.

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Hot-max-torches HTK-MD Manuel d'utilisateur Page 7

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