8
2. P/N 20813 Oxygen Kit contains the following PT-
15XL parts and tools:
4-0.098" Nozzle Assembly, P/N 21206B
8-Electrode Tip, P/N 20763
1-Electrode Tip Holder, P/N 20398
4-Gas Swirl Baffle, P/N 2075586
1-Nozzle Retaining Cup, P/N 20758
1-Insulator Body, P/N 20755
1-Pilot Arc Cable, P/N 20760
1-Contact Ring Assembly, P/N 996341
10-O-ring, P/N 86W85 .468 I.D.
20-O-ring, P/N 996526 .145 I.D.
10-O-ring, P/N 996527 1.30 I.D.
10-O-ring, P/N 996528 1.614 I.D.
1-Nozzle/Elec. Tip Holder Removal Tool, P/N 999630
1-Electrode Tip Removal Tool, P/N 996568
1-1/16" Allen Wrench, P/N 93750006
1-Silicone Grease (1 oz. tube), P/N 17672
1-Tool Box, P/N 950561
1-Retainer For Front Body Insulator P/N 33768
3.Reverse Swirl Nozzles and Gas Baffle
Standard swirl produces the least bevel on the right
hand side of the cut, as viewed in the direction of
travel. Sometimes, such as when mirror image cut-
ting, it is desirable for the square side to be on the left.
This requires the use of reverse swirl Nozzles and
Baffles. See Table 1 for P/N's. DO NOT mix standard
and reverse swirl parts on the same torch!
4. Oxygen and Beveling Nozzle Retaining Cup, P/N
20758 - Permits beveling up to 45
0
. Required for use
with Air Curtain or Bubble Muffler.
5. Corrosion Resistant Nozzle Retaining Cup P/N
21217. This cup has the same shape as the cup,P/N
20758 above but is insulated to reduce corrosion in
service with conductive cut water. This insulation
does not make it safe to touch the torch with the
power source on.
6. Two Piece O
2
Nozzle Assemblies: 21206B (STD) &
21207B (Rev.) These nozzles have a replaceable
ceramic insulator (P/N 21193).
III. FUME & NOISE REDUCTION
H
2
explosions can kill. H
2
explosions can result from
cutting underwater, especially when cutting active
metals such as aluminum or magnesium. See Form
14-373 (supplied with torch) or forms 12-528 or 15-
116 for more information.
A. Underwater cutting (N
2
ONLY)
1. Simply immersing the top of the workpiece under 2" to
3" of water markedly reduces fume and noise. Mate-
rials up to 1" thick can generally be cut underwater
with slight reductions in speed and quality.
2. Underwater cutting substantially reduces speed and
quality on thicker plates, especially aluminum. Cutting
plates thicker than 3 inches underwater is not recom-
mended.
3. Cutting underwater with Argon-Hydrogen is not rec-
ommended as explosive gas mixtures may collect in
the water table.
4. Underwater cutting with O
2
requires the use of a
Bubble Muffler or Air Curtain.
B. Air Curtain - The air curtain directs a flow of air around
the arc which permits underwater cutting with O
2
gas.
See Form 15-128 for details.
Standard Air Curtain Kit P/N 21385
Beveling Air Curtain Kit P/N 21404
C. Bubble Muffler - This device traps a bubble of air
around the arc using water recirculated from the water
table. This allows use of O
2
under water. The water
flow acts as a shield to block radiation and trap fumes
so that protection is also afforded when cutting above
water. See form 15-127 for details.
Bubble Muffler system P/N 2232615
D. Water Muffler - this device is used for suppression of
fume and noise when cutting with N
2
above water.
Contact your cutting machine representative for de-
tails.
IV. Maintenance (Refer to Figures 2 thru 5)
Electric Shock can kill.
Disconnect Power Source from incoming electrical
power before touching or servicing the torch. Metal
parts of the torch can be at high voltage.
Never use oil or grease on this torch. Handle parts
only with clean hands on a clean surface. Oil and
grease are easily ignited and burn violently in the
presence of oxygen under pressure. Use silicone
lubricant only where directed.
A. Removal & Replacement of Nozzle Assembly
1. Unscrew the nozzle retaining cup from the torch. If
the fine threads on the nozzle retaining cup and
torch body are dirty, clean and then spray the -
7. Retainer for Front Body Insulators: 33768, can be
used to prevent movement of front body insulator
when servicing torch.
WARNING
!
!
DANGER