ROTHENBERGER ROFLASH - Handbuch (Seite 24)

20 ENGLISH
In case of fuel gas withdrawal from a distribution line or single cylinder, the use of safety
equipment in accordance with DIN EN 730 is mandatory.
ROTHENBERGER Werkzeuge GmbH also recommends protection of the oxygen withdrawal point
from a distribution line or single cylinder. Please observe: VGB 15
Î Select the correct type of a torch attachment (19 or 20) for the handle ROFLASH (15) in
accordance with the work to be carried out, such as welding, heating, brazing or torch
cutting as well as according to material thickness or workpiece size (refer: 1. technical data).
During installation of the torch attachment in the handle, make sure that the connections
and seals are clean and not damaged. The connecting nut (18) must be hand tightened.
5.2 Light the Burner
Î Adjusting the operating pressure. First, ensure that the oxygen and fuel gas valves (16 and
17) on the handle (15) are closed.
Î Slowly open the cylinder valves (1 and 2) or the tapping point valves in the distribution line (9
and 10). Pressure adjusting valves (5 and 6) on the pressure regulators are relieved of tension,
and the shut off valves (7 and 8) are closed.
Î Adjust the operating pressures on the two cylinder pressure regulators (3 and 4) or on the
tapping point pressure regulators (11 and 12) by screwing in the adjusting valves (5 and 6)
according to the information included in the corresponding operating data tables (section 2)
or according to the data on the applicable torch attachment. Open the shut-off valves (7 and
8) of the cylinder pressure regulators.
Ignition and adjustment of the flame of combination torches:
Î
First open the adjustment valve for oxygen (16) on the handle (15), and then open the
adjustment valve for fuel gas (17) on the handle (15). Ignite the escaping gas mixture.
Afterwards, readjust the operating pressures on the
pressure regulators as required.
Î Adjustment of the "neutral flame" required for welding
tasks
Î First adjust the fuel gas surplus using the valve for fuel
gas (17). For welding tasks, a neutral flame is normal.
Then use the same valve (17) to reduce the flow of fuel
gas until the longest sharply defined flame cone is
created.
Other flame settings, e.g., fuel gas surplus for flame-
brazing or oxygen surplus for for flame-heating can be
adjusted by opening or reducing operations performed
on the fuel gas valve (17).
5.3 Torch cutting
Î Select the torch cutting nozzles (23) according to the workpiece thickness (refer: section 2)
and then screw them until leaktight into the torch tip of the cutting attachment (20) or hand
held cutting torch (15).
Î Using a suitable wrench tighten firmly the nozzle retaining nut in the torch tip. Use clean,
undamaged ROTHENBERGER original torch cutting nozzles only. Make sure that the sealing
surfaces on the nozzles and torch tip are in perfect condition; if necessary, fasten torch
carriage (24) on to the torch tip and adjust the nozzle distance to the workpiece surface
(refer: section 2)
Adjusting the operating pressures
Î
First, keep the adjustment valves for oxygen and fuel gas (16 and 17) on the handle or hand-
held cutting torch closed.
Î Slowly open the cylinder valves (1 and 2) or the tapping point valves in the distribution line (9
and 10).
neutral flame
flame with oxygen surplus
flame with acetylene surplus