Always use the appropriate gas for the material being welded. Three types are
provided by Clarke International, as follows:
Carbon Dioxide (CO
2
) ......... For Mild Steel .................... Part No. 6000642
Argon .................................... For Aluminium ................... Part No. 6000661
CO2/Argon Mix .................... For Thin Sheet metal
Mild Steel/ Stainless ......... Part No. 6000660
Additionally a larger CO2 bottle is available ............... Part No. 6000643
Replacement Gas Regulator ........................................... Part No. 8132000
Attaching Gas Bottle and Regulator
1.
If using disposable gas bottles
remove the protective plastic cap
from the threaded top of the bottle
and screw the regulator (F) down
in a clockwise fashion until tight (be
careful not to put too much force
on the regulator when tightening).
2.
Insert the plastic gas tube into the
regulator (push all the way in). Note:
when changing disposable bottles,
push in the outer flange of the
regulator orifice to allow easy
release of the plastic tube.
3.
The operation of the pressure regulator, for use with disposable bottles, is based on
the action of a needle operated by a knob placed over a graduated dial plate
(from “0” to “6”), acting on the valve of the bottle. With the knob turned to position
“0” there is no gas flow; before starting to weld bring the knob to position “3” or “4”,
achieving a gas flow of 2/3 litres/minute. In order to obtain the maximum service
from each gas bottle, always maintain a minimum gas flow (2/3 litres per minute)
which is sufficient to obtain a good weld without porosity. The pressure regulator is
equipped with a safety valve which will automatically operate should the pressure
surge.
4.
For safety and economy, ensure that the regulator is fully closed (turning fully anti-
clockwise) when not welding and/or before fitting or removing the gas bottle.
5.
When using a rechargeable bottle insert the plastic gas tube into a
large gas bottle adaptor. Connect the tail end of the adaptor to a length
of 1/4" (6 mm.) dia. flexible gas pipe and connect this pipe to a gauged
pressure regulator which is screwed onto the rechargeable bottle. The
gauged pressure regulator is then used to control the flow of gas which
Fig.9
19
