© ESAB AB 1999
- 5 -
bg03d1ea
2
INTRODUCTION
PKB
is an air-operated welding gun with a pneumatic motor incorporated in the
handle. A wire feed unit is fitted in the gun housing.
Different welding speeds can be selected by way of a valve regulating the speed of
the motor.
The welding gun is available in two models, PKB 250 and PKB 400. In the PKB 400
model the outgoing air is used for forced cooling of the gun.
Swan Neck
The gun can be provided with a swan neck which is
turnable 360
°
when the locking
screws in the wire feed unit have been loosened.
The swan neck provides better access when welding in narrow spaces.
Gun Trigger
When the trigger is pressed into its first position the flow relay of the feed unit is
activated and the operating circuit closes.
When the trigger is pressed as far as it will go the air valve is fully opened and the
wire is fed according to the set value.
By slackening the trigger a little during welding, both the wire feed speed and the
welding current will be decreased and the control of the molten pool will be
improved.
Valve for Setting the Wire Feed Speed
The wire feed speed is proportional to the welding current and is set by way of the
speed regulator on the welding gun.
The wire diameter is of vital importance to the welding current. The coarser the wire,
the higher the amperage.
The speed regulator on the PKB is graded 0-9. The index arrow on the left-hand side
of the gun housing indicates the zero position. The knob can be turned some 2.5
turns.
PKB 400 is provided with a hand shield against the heat radiation.
Welding Hose
The welding hose is available in three lengths: 5, 10 and 16 m.
3
TECHNICAL DATA
Welding gun
PKB 250
PKB 400
Permissible load at 60% duty cycle
Carbon acid CO
2
Gas mixture, Argon (Al electrode)
'
250 A / 26.5 V
200 A / 24 V
400 A / 34 V
280 A / 28 V
Electrode diameter
0.8-1.2 mm
0.8-1.6 mm
Air consumption
Max. 280 l/min
Max. 280 l/min
Air pressure, max
590 kPa (6 kp/cm
2
)
590 kPa (6 kp/cm
2
)
Dimensions l x h
210 x 250 mm
210 x 260 mm
Weight
1.2 kg
1.4 kg
GB
