ESAB HandyPlasma 550, Installation, Operation And Service Manual

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Fig. 4-2 - Assembly of “XT” Consumable Parts
The PT-31XL torch head contains a gas flow check
valve that acts in conjunction with the flow switch
and circuitry within the power source. This system
prevents the torch from being energized with high
voltage if the torch switch is accidentally closed
when the shield is removed. ALWAYS REPLACE TORCH
WITH THE PROPER TORCH MANUFACTURED BY ESAB
SINCE IT ALONE CONTAINS ESAB’S PATENTED SAFETY
INTERLOCK.
For additional torch information, see booklet (F-14-246)
packed with the PT-31XL torch.
4.4 CUTTING WITH THE PT31XL
Wear the usual protective gloves, clothing, and hel-
met. Helmet with filter lens shade No. 6 or 7 should
provide adequate protection for your eyes.
Never touch any parts forward of the torch handle
(tip, heat shield, electrode, etc.) unless the power
switch is in the OFF position.
CAUTION: Do not depress the torch switch unless the
torch nozzle is touching or within 0.020-in.
(less than 1/32-in.) of the workpiece.
E. "Low Air Flow" LED Green light - will turn on during
operation when the air flow is correct. Will switch off
below 15psi (1 bar).
F. On/Off Switch (White light) - will light when switched
on, even if the machine stopped for any reason. Will turn
off when switch is in OFF position or the light bulb is
defective.
G. Air Pressure Gauge (Front Panel) - Shows air pressure
in bars and psi.
4.3 ASSEMBLING PT31XL COMSUMABLE
PARTS
Make sure power switch on power source is in OFF
position and primary input power is deenergized.
To assemble “XT” consumables, remove the seat supplied with
the torch. Insert the plunger into the head. (The plunger is
reversible.) Then reassemble the seat firmly with a wrench.
Install the electrode, baffle, nozzle, and heat shield as shown in
Fig. 4-2. Tighten heat shield snugly but do not overtighten.
BE SURE to install the swirl baffle in the torch. Failure
to do so would allow the nozzle (tip) to contact the
electrode. This contact would permit high voltage to be
applied to the nozzle. Your contact with the nozzle or
workpiece could then result in serious injury or death
by electric shock.
Fig. 4-3 - Effect of Cutting Speed
TOO FAST TOO SLOW CORRECT
NOTE: Nozzles
Marked By
Amperage
20862
Plunger
Seat
19679 Electrode
20324
20463
Baffle Nozzle
Heat Shield
20282
30/40A
20860
SECTION 4 OPERATION