ESAB PT-27 Plasma Arc Cutting Torch User manual

Type
User manual

ESAB PT-27 Plasma Arc Cutting Torch is designed to provide exceptional cutting performance for various metalworking applications. With its innovative 75-degree head design and compatibility with Plasma Arc Cutting Packages, the PT-27 torch offers precise and efficient cutting capabilities. It operates using clean, dry air as the plasma gas and comes in service line lengths of 25 feet (7.6 m) and 50 feet (15.2 m). Capable of handling a maximum current of 80 amperes at 100% duty cycle, this torch is suitable for demanding cutting tasks.

ESAB PT-27 Plasma Arc Cutting Torch is designed to provide exceptional cutting performance for various metalworking applications. With its innovative 75-degree head design and compatibility with Plasma Arc Cutting Packages, the PT-27 torch offers precise and efficient cutting capabilities. It operates using clean, dry air as the plasma gas and comes in service line lengths of 25 feet (7.6 m) and 50 feet (15.2 m). Capable of handling a maximum current of 80 amperes at 100% duty cycle, this torch is suitable for demanding cutting tasks.

PT-27
Plasma Arc Cutting Torch
Instruction Manual (EN)
0558005270
66
This equipment will perform in conformity with the description thereof contained in this manual and accompa-
nying labels and/or inserts when installed, operated, maintained and repaired in accordance with the instruc-
tions provided. This equipment must be checked periodically. Malfunctioning or poorly maintained equipment
should not be used. Parts that are broken, missing, worn, distorted or contaminated should be replaced imme-
diately. Should such repair or replacement become necessary, the manufacturer recommends that a telephone
or written request for service advice be made to the Authorized Distributor from whom it was purchased.
This equipment or any of its parts should not be altered without the prior written approval of the manufacturer.
The user of this equipment shall have the sole responsibility for any malfunction which results from improper
use, faulty maintenance, damage, improper repair or alteration by anyone other than the manufacturer or a ser-
vice facility designated by the manufacturer.
BE SURE THIS INFORMATION REACHES THE OPERATOR.
YOU CAN GET EXTRA COPIES THROUGH YOUR SUPPLIER.
These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the
principles of operation and safe practices for arc welding and cutting equipment, we urge
you to read our booklet, “Precautions and Safe Practices for Arc Welding, Cutting, and
Gouging,” Form 52-529. Do NOT permit untrained persons to install, operate, or maintain
this equipment. Do NOT attempt to install or operate this equipment until you have read
and fully understand these instructions. If you do not fully understand these instructions,
contact your supplier for further information. Be sure to read the Safety Precautions be-
fore installing or operating this equipment.
CAUTION
USER RESPONSIBILITY
67
TABLE OF CONTENTS
1.0 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
2.0 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
2.1 General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
2.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
2.3 Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
2.4 Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
3.0 Assembly & Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
3.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
3.2 Assembly
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
3.3 Steel Heat Shield Guards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
4.0 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.1 General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.2 Inspection and Cleaning of Consumables
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.3 Removing/Replacing Torch Head & Switch from Service Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.4 Pilot Arc Lead and Insulators Assembly Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
4.5 Switch and Pilot Arc Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
5.0 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.2 Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Section / Title Page
68
TABLE OF CONTENTS
69
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SECTION 1 SAFETY PRECAUTIONS
70
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SECTION 1 SAFETY PRECAUTIONS
71
SECTION 2 DESCRIPTION
WARNING
2.1 General
The patented PT-27 (Figure 2-2) is a manual torch with a 75° head designed for use with several Plasma Arc Cut-
ting Packages using clean, dry air as the plasma gas. The service line lengths available with the PT-27 torch are
25 feet (7.6 m) and 50 feet (15.2 m). The PT-27 torch is rated to operate at a maximum of 80 amperes at 100%
duty cycle.
2.2 Scope
This manual is intended to provide the operator with all the information required to assemble, operate, and
repair the PT-27 Plasma Arc Cutting Torch. For additional safety precautions, process instructions, and system
troubleshooting; refer to the appropriate instruction manual for your Plasma Arc Cutting Package.
2.3 Specifications
Refer to Figure 2-1, Figure 2-2, and Figure 2-3 for specifications.
THE PLASMA ARC CUTTING PROCESS EMPLOYS HIGH VOLTAGES.
CONTACT WITH "LIVE" PARTS OF THE TORCH AND MACHINE MUST
BE AVOIDED. ALSO, THE IMPROPER USE OF ANY OF THE GASES EM
PLOYED CAN PRESENT A SAFETY HAZARD. BEFORE BEGINNING OP
ERATION WITH THE PT27 TORCH, REFER TO THE SAFETY PRECAU
TIONS AND OPERATING INSTRUCTIONS IN THE APPROPRIATE POWER
SOURCE INSTRUCTION MANUAL.
USING THE TORCH ON ANY UNIT NOT EQUIPPED WITH A MATING
SAFETY INTERLOCK CIRCUIT MAY EXPOSE OPERATOR TO UNEXPECT
ED HIGH VOLTAGE.
Figure 2-1. PT-27 Specifications
Torch Assembly
(Part No.)
Service Line
Length
Weight Pilot Arc Connection Type Current Capacity
(100% duty)
0558000487 25 ft. (7.6 m)
6.9 lbs (3.1 kg)
RING
(for service with current consoles
equipped with pilot arc terminal studs)
80 A DCSP
0558000490 50 ft. (15.2 m)
72
SECTION 2 DESCRIPTION
7.3" (185 mm)
1" (25.4 mm)
1" (25.4 mm)
75°
3" (76 mm)
Figure 2-2. PT-27 Dimensions
THICKNESS (IN. STEEL)
SPEED (IN. PER MIN.)
Figure 2-3. PT-27 Cutting Performance
73
SECTION 2 DESCRIPTION
2.4 Optional Equipment (NOT SUPPLIED WITH TORCH)
A. Spare Parts Kits - The spare parts kits listed in figure 2-4 are recommended for maintaining the PT-27
torch with minimum downtime.
DESCRIPTION PART NUMBER
(50A Kit - P/N
558 000488)
PART NUMBER
(70A Kit - P/N 558 003466)
PART NUMBER
(80 A Kit - P/N 558 000489)
CUTTING NOZZLE 50 A 558 000  363 QUANTITY  4
-- --
CUTTING NOZZLE 80 A
--
558 000  457 QUANTITY  4 558 000  457 QUANTITY  4
ELECTRODE 558 000  364 QUANTITY  3 558 000  364 QUANTITY  3 558 000  364 QUANTITY  3
GAS DIFFUSER 558 000  365 QUANTITY  1 558 000  365 QUANTITY  1 558 000  365 QUANTITY  1
HEAT SHIELD BLUE 558 000  486 QUANTITY  2 558 000  486 QUANTITY  2 558 000  486 QUANTITY  2
CUTTING SUPPORT 558 000  367 QUANTITY  1 558 000  367 QUANTITY  1 558 000  367 QUANTITY  1
FUSE 250V/15A 558 000  465 QUANTITY  4
 558 000  465 QUANTITY  3
Figure 2-4. Contents of PT-27 Spare Parts Kits
B. Steel Guards (for extending the life of the heat shield) - Refer to Figure 3-2 for installation and opera-
tion.
PLASMA GUIDE KIT -
P/N 0558000493
consists of:
circle guide adapter/bushing
roller guide radius bar
pivot pin suction pivot
magnetic pivot operator's manual
PLAIN TYPE
P/N 0558000481
GOUGING NOZZLE
P/N 0558000474
STAND OFF GUIDE TYPE
P/N 21420
C. Gouging Nozzle
D. Plasma Guide Kit
74
SECTION 2 DESCRIPTION
75
SECTION 3 ASSEMBLY & OPERATION
3.1 GENERAL
THE TORCH HEAD CONTAINS A GAS FLOW CHECK VALVE THAT ACTS IN
CONJUNCTION WITH 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.
ELECTRODE
SWIRL BAFFLE
NOZZLE
SHIELD
THREAD THIS ASSEMBLY TO THE
TORCH BODY AND HAND TIGHTEN.
2
3
IMPORTANT!
MAKE SHIELD VERY TIGHT!
PLACE THE NOZZLE, SWIRL BAFFLE,
AND ELECTRODE INTO THE SHIELD
1
Figure 3-1. Assembly of PT-27 Torch Front End Parts
3.2 Assembly
Install PT-27 front end parts as shown in Figure 3-1.
MAKE SURE POWER SWITCH ON CONSOLE IS IN THE "OFF" POSITION
AND PRIMARY INPUT POWER IS DE ENERGIZED.
WARNING
WARNING
76
SECTION 3 ASSEMBLY & OPERATION
3.3 Steel Heat Shield Guards
THIN GAUGE MATERIALS
CAN BE CUT WITH 1/16" (2.6 mm)
TORCH-TO-WORK DISTANCE
ADJUST TO 3/16" (4.8 mm) FOR
MATERIALS OVER 1/4" (6.4 mm) THICK
ADJUST GUIDE BY TURNING
IN A CLOCKWISE DIRECTION
ONLY. THIS WILL PREVENT
ACCIDENTAL LOOSENING
OF SHIELD.
STEEL GUARD
STAND OFF GUIDE
P/N 21420
IF GUIDE IS TOO TIGHT ON
SHIELD, OPEN SLOT WITH
SCREWDRIVER.
IF TOO LOOSE, CLOSE
SLOT WITH VISE OR
LARGE PLIERS.
1/16" (1.6 mm) TO 1/4" (6.4 mm)
TORCH-TO-WORK
GUIDE AGAINST
STRAIGHT EDGE
OR FREE-HAND
CUT
STEEL GUARD
(P/N 0558000481) PROTECTS
SHIELD WHEN CUTTING OR
GOUGING.
Figure 3-2. Installation and Operation of Steel Heat Shield Guards
77
4.2 INSPECTION AND CLEANING OF CONSUMABLES
A. Disassemble the front end of the PT-27 as follows:
1. Position torch head in a downward direction (refer to Figure 3-1) and remove the shield. The nozzle, swirl
baffle, and electrode will drop from the head and remain in the shield. Remove these components and
inspect for wear. The nozzle and electrode will generally wear at the same rate. For best performance,
replace together.
2. Nozzle: Replace if the orifice is clogged, nicked, or out-of-round.
3. Electrode: See Figure 4-1 for electrode maintenance.
4. Shield: The face of the shield will gradually erode from the heat and molten metal spray. Replace the
shield if more than 1/8 inch (3.2 mm) has eroded from the face. Refer to Figure 4-1.
5. Swirl Baffle: This is a ceramic part and may crack or chip if dropped. Always replace if cracks or chips are
present.
6. O-ring: Lubricate as per Figure 4-1. Replace if cut or worn. Air leaking past this seal will reduce cutting
performance.
B. To replace the above front end components, refer to Figure 3-1.
Figure 4-1. O-ring, Electrode, and Shield Maintenance
HEAT SHIELD
LUBRICANT (P/N 0558000443) CAN BE AP-
PLIED TO O-RING OR HEAT SHIELD.
THE HEAT SHIELD FACE WILL GRADUAL-
LY ERODE WITH USE. SEE PARAGRAPH
4.2.A.4.
19/32"
(15.1 mm)
REPLACE ELECTRODE BEFORE LENGTH
BECOMES SHORTER THAN 19/32 INCH -
(15.1 mm).
O-RING
ELECTRODE
WARNING
4.1 GENERAL
BEFORE ANY MAINTENANCE IS ATTEMPTED ON THIS TORCH, MAKE
SURE THE POWER SWITCH ON THE CONSOLE IS IN THE "OFF" POSI
TION AND THE PRIMARY INPUT IS DE ENERGIZED.
SECTION 4 MAINTENANCE
CAUTION !
78
SECTION 4 MAINTENANCE
BE SURE TO TIGHTEN POWER CABLE CONNECTIONS SECURELY US
ING 2 WRENCHES DURING REASSEMBLY. FACTORY RECOMMENDED
TORQUE IS 3.39 NM OR 30 INLBS. FAILURE TO DO SO COULD RE
SULT IN SERIOUS INJURY TO THE OPERATOR.
WARNING
4.3 Removing / Replacing Torch Head and Switch from Service Line
Figure 4-2. Removal of Torch Head and Switch from Service Line
2
3
1
Snap switch band from handle and release
switch, no further disassembly is required
for switch replacement. (see figure 4-5 for
switch replacement)
Vinyl tape
Cable Bundle Assembly
Push flex support
back from handle
Handle
Power Cable
Tube Insulator
Two wrenches (3/8” & 7/16”)
Strip Insulator
Torch Head-
Unscrew handle, remove tape that secures both strip
and tube insulators. Remove head from power cable.
(use two wrenches, see warning above)
Knife connection
Cable Bundle Assembly
Handle
Tube Insulator
jacket rolled back
Black Pilot Arc lead
Switch leads
Remove tape securing the jacket and control wires.
(note how switch leads are coiled around power
cable and the loop in the pilot arc lead. Reassemble
in like manner). See figure 4-3 for reassembling pilot
arc lead.
Pull black pilot arc lead out from tube
insulator to expose knife connections.
Open knife connections. Slide handle
and tube insulator from service line to
complete the disassembly. (see figure
4-3 for reassembling the pilot arc lead
and insulators)
79
2
3
1
PT-27 Head
Slide tube insulator on pilot arc lead
jacket rolled back
Black Pilot Arc lead
Vinyl tape
Strip Insulator
p/n
0558000437
Connect power cable
(see warning figure 4-2)
Pull pilot arc lead out
from handle. Keep tube
insulator against head.
Place strip insulator between power cable
connection and tube insulator. Tape in place
as illustrated.
Loop to remove slack
(see figure 4-2).
SECTION 4 MAINTENANCE
Figure 4-3. Attaching Pilot Arc Lead and Assembling Insulators
4.4 Pilot Arc Lead and Insulators Assembly Detail
80
4.5 SWITCH AND PILOT ARC PLUGS
Figure 4-4. Switch and Pilot Arc Plug Removal/Replacement
STRAIN RELIEF
TUBING - 21622
SWITCH PLUG
P/N 2062336
WHITE SWITCH LEADS (2)
FROM TORCH SWITCH
STRAIN RELIEF
TUBING - P/N 055800079)
STRIP INSULATION 1/4" (6.4 mm)
BRASS TERMINAL
BLACK PILOT ARC LEAD
BLUE JUMPER
(SEE BELOW)
DO NOT STRIP INSULATION FROM
THESE THREE WIRES
*PILOT ARC PLUG
A. SWITCH PLUG
CHROME PLATED TERMINAL
BLACK PILOT ARC LEAD
(ATTACH TO CHROME PLATED TERMINAL)
BLUE JUMPER
STRAIN RELIEF TUBING
P/N 21622
PILOT ARC PLUG
BRASS TERMINAL
CHROME PLATED TERMINAL
B. PILOT ARC LEAD AND PLUG
(ON TORCH ASSEMBLY 21620)
DO NOT INTERCHANGE THE TORCH SWITCH PLUG AND THE PILOT
ARC PLUG. IF IT BECOMES NECESSARY TO REMOVE THESE PLUGS,
MAKE SURE THE SWITCH PLUG P/N 2062336IS ATTACHED TO THE
TWO WHITE SWITCH LEADS AND THE PILOT ARC PLUG IS ATTACHED
TO THE BLACK LEAD WITH THE BLUE JUMPER WIRE.
INTERCHANGING THESE PLUGS MAY CREATE AN UNSAFE CONDITION
THAT COULD CAUSE ELECTRIC SHOCK AND BURNS.
*TORCH ASSEMBLY 0558000487 USES A RING CONNECTOR IN PLACE OF
THIS PLUG (REFER TO FIGURE 5-1)
WARNING
SECTION 4 MAINTENANCE
81
SECTION 4 MAINTENANCE
Figure 4-5. Switch Replacement Detail
CRIMP OR SOLDER
To replace - Remove switch band from torch (see figure 4-2). Pull the switch and end plug out of the cover. Snip
the white leads from the switch (leads supplied with the torch cable bundle are sufficiently long to allow cut-
ting). Crimp or solder the replacement switch to the leads.
WHITE LEADS
COVER
SWITCH END PLUG
SWITCH KIT P/N 0558005509
Note:
Switch can be mounted on top or bottom of handle.
82
SECTION 4 MAINTENANCE
83
SECTION 5 REPLACEMENT PARTS
5.1 General
Always provide the serial number of the unit on which the parts will be used. The serial number is stamped on
the unit nameplate.
To ensure proper operation, it is recommended that only genuine ESAB parts and products be used with this
equipment. The use of non-ESAB parts may void your warranty.
Replacement parts may be ordered from your ESAB Distributor.
Be sure to indicate any special shipping instructions when ordering replacement parts.
Refer to the Communications Guide located on the back page of this manual for a list of customer service phone
numbers.
5.2 Ordering
Bill of material items that have blank part numbers are provided for customer information only.
Hardware items should be available through local sources.
Note
5.0 Replacement Parts
84
SECTION 5 REPLACEMENT PARTS
Switch Kit - p/n 0558005509
(see figure 4-5)
jacket shown rolled back
Flex Support - p/n 21218
Boot - p/n
0558000793
Cable Bundle Assembly
25 ft. (7.6 m) - p/n 0558005677
50 ft. (15.2 m) - p/n 0558006547
Switch Band - p/n 33400
Tube Insulator supplied
with torch assembly
Insulator - p/n 0558000437
(supplied with head)
Knife connections -
p/n 0558000432
(2 supplied with head)
Handle - p/n 33399
Gas & Power 5/8 - 18 L.H.
Switch Plug -
p/n 2062336
Figure 4-4 A
Pilot Arc Ring Terminal
(supplied on torch assembly
21661)
Strain
Relief - p/n
0558000794
Strain Relief
- p/n 21622
Pilot Arc Plug - (see figure 4-4 B)
75° Head - p/n 0558000477
includes:
Insulator - p/n 0558000437
Knife Connect - p/n 0558000432
O-ring - p/n 0558003694
Seat - p/n 0558003032
PT-27 Torch
Replaceable Seat -
p/n 0558003032
Seat Installation Tool -
p/n 0558003027
The seat is removed and replaced using the ESAB seat
tool.
All torch assemblies and replacement heads are supplied
with the seat installed.
O-ring - p/n 0558003694
(Supplied with head)
Electrode - p/n 0558000364
Swirl Baffle - p/n 0558000365
Nozzle
*50 amp - p/n 0558000363
70 amp - p/n 0558000457
80 amp - p/n 0558000457
Gouging - p/n 0558000480
Shield - p/n 0558000486
*Replacement torches are supplied
with 50 amp nozzles.
Figure 5-1. PT-27 Torch Assembly Replacement Parts
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ESAB PT-27 Plasma Arc Cutting Torch User manual

Type
User manual

ESAB PT-27 Plasma Arc Cutting Torch is designed to provide exceptional cutting performance for various metalworking applications. With its innovative 75-degree head design and compatibility with Plasma Arc Cutting Packages, the PT-27 torch offers precise and efficient cutting capabilities. It operates using clean, dry air as the plasma gas and comes in service line lengths of 25 feet (7.6 m) and 50 feet (15.2 m). Capable of handling a maximum current of 80 amperes at 100% duty cycle, this torch is suitable for demanding cutting tasks.

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