Gas Supply; Welding Attachment, Welding Nozzles; Cutting Attachment, Cutting And Heating Nozzles - MW MWW Manual De Instrucciones

MWW Welding and Cutting Torch - Preparation
3.4

Gas Supply

The gas supply has to be in conformity with the valid regulations. The necessary
operating pressures and flow rates of the welding and cutting attachments must
be reached. Pay attention to the pressure decrease caused by the hoses, safety
devices and pressure regulators.
When using a 50 l acetylene cylinder, the maximum gas consumption for contin-
uous operation is about 500 l/h and for short-term usage approx. 1000 l/h.
A 33 kg propane cylinder has a maximum gas output of 0.6 – 0.8 kg/h in continu-
ous operation. For short-term usage the maximum gas consumption is 2.0 – 3.0
kg/h. The number of linked cylinders can be calculated using these values and
the gas consumption data listed on page 22.
3.5

Welding Attachment, Welding Nozzles

The connection between welding attachment and handle is realized by a cap nut.
The choice of welding attachment depends on the thickness of the metal to be
welded. The labeling indicates the operating range. The attachments up to 6-9
mm are used for welding, attachments from 9-14 mm can be used for flame
heating. In an operating range of 30-50 mm and above, use the handle MWW
520/1 Special (stock no. 21240/1) with a rapid-action valve for oxygen. For your
safety, only combine nozzles and attachments with the same operating range la-
beling. For example, a welding nozzle with a 6-9 mm range has to be used in
combination with a 6-9 mm welding attachment. Only use the type of fuel gas
indicated by the labeling of the nozzle.
3.6

Cutting Attachment, Cutting and Heating Nozzles

The size of the cutting nozzle depends on the thickness of the metal to be cut.
The cutting nozzle has to be screwed into the head of the cutting attachment us-
ing a size 10 spanner. Following this, attach the heating nozzle.
The choice of heating nozzle depends on the operating range and the type of fuel
gas. Only use the fuel gas indicated by the labeling of the heating nozzle. Details
are shown in the gas consumption table on page 22.
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