GCE proFIT Instructions For Use Manual Download Page 12

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4.1.2.

only the cutting nozzle according to chart above shall be used. Nozzle-mix/injector type of the cutting

torch has to be respected as well as type of the fuel gas. use only undamaged nozzle with undamaged and
clean seat.

4.1.3.

please check also cutting torch head seat before mounting the nozzle into the cutting torch head. only

cutting torch from the list above with undamaged and clean nozzle seat can be used. Nozzle-mix/ injector
type of the cutting torch has to be respected as well as type of the fuel gas.

4.1.4. noZZLE CHooSInG

please follow the chart with cutting nozzles above. use proper nozzle size

according to metal plate thickness. gcE cutting nozzles are designed for cuts of quality level 1 according to
EN  iso  9013.  it  is  possible  to  reach
maximal cutting speed by set-up cutting
parameters  according  to  chart  above,
cutting of straight cuts, by using of clean
metal  sheet  surface,  quality  cutting
machine, undamaged cutting nozzle and
oxygen with purity 99,5% or better. gas
pressures  are  measured  at  the  torch
inlet.

4.1.5.tightening torque of the nozzles:

Nozzle-mix cutting torch: 22-30 Nm cutting

torch Fit Mini: 22-30 Nm cutting torch bir
Mini: 12 Nm for inner cutting nozzle and
18Nm for outer heating nozzle.

noTE

: all parts in contact with oxygen should

be  free  of  oil  and  grease  due  to  explosion
hazards!  check  whether  all  threaded  joints
and  sealing  surfaces,  e. g. cones  and  balls,
are clean and undamaged!

4.2. FLaME IGnITIon anD SET UP

4.2.1.

check all gas connection tightness.

4.2.2.

adjust inlet gas pressures according to

the  values  in  the  table  of  cutting  nozzles
above,  see  point  2.5.  (1  bar  =  1,05  kpa
100kpa = 105 N/m2,  1 bar = 14,22 psi). the
operating  pressures  for  the  heating  oxygen
and  fuel  gas  should  be  adjusted  with  open
torch  valves.  Open  the  fuel  gas  valve  and
heating  oxygen  valve.  ignite  the  outgoing
mixture  with  proper  lighter  supplied  with  the  machine.  With  correct  pressure  adjustment  is  produced
carburizing flame. a neutral heating flame is to be adjusted with the fuel gas valve to suit the cutting task.
the heating oxygen valve remains fully open. Use a proper lighter given along with the machine to ignite the
flame. do not use hot metal or matchstick.

4.2.3.

Open shortly the cutting oxygen valve to see correct adjustment of neutral flame and close it

afterwards (see also Fig.6).

4.3.CUTTInG PRoCESS InITIaTIon

Bring the torch to the initial cutting position and start locally heating the workpiece to the ignition

temperature, approximately bright red / yellow colour. then open the cutting oxygen valve and switch on
the feed in the same moment.

4.4. THE CoRRECT CUTTInG SPEED

can be seen from the slag production, from the

Fig.7: Zn coated track extension

almost vertical spray of sparks

and from the cutting noise. the approximate values of the cutting speed can be taken from relevant cutting
nozzle table as above.

Fig.6: Flame adjustment