Hard-
Surfacing,
Building
Fusion
Welding
Carbon
Welding
Non-Ferrous
Metals
Heating
& Heat
Treating
Braze
Welding
Welding
Cast Iron
Welding
Ferrous
Metals
Brazing
&
Soldering
Equipment
Set-Up
Operation
Equipment
For
OXY-Acet
Structure
of
Steel
Mechanical
Properties
of Metals
Oxygen
&
Acetylene
OXY-Acet
Flame
Physical
Properties
of Metals
How Steels
Are
Classified
Expansion
&
Contraction
Prep
For
Welding
OXY-Acet
Welding
& Cutting
Safety
Practices
Manual
Cutting
Oxygen
Cutting By
Machine
Appendices
Testing
&
Inspecting
Continued on next page...
The CGA 510 connection has left-hand
threads, internal on the cylinder outlet; the CGA 300 connection has right-
hand threads, external on the cylinder
outlet. Tighten
both regulator connection nuts firmly with a wrench. (Avoid use of adjustable
wrenches. Wrenches with two or
more fixed openings, designed specifically for use with gas welding and cutting
apparatus, are available from all apparatus
suppliers.) PRECAUTION: Should it ever be necessary to
retighten the regulator union nut after the outfit
has been set up and the cylinder valves opened, be sure to close the cylinder
valve before tightening the nut. Rotate
the pressure-adjusting screw of each regulator to the left (counter-clockwise)
until it turns freely. It
is essential that the valve in the
regulator be closed before cylinder pressure is admitted to the regulator. To
achieve this, the pressure-adjusting
screw must be backed off until it no longer is pushing against the pressure-
adjusting spring in the regulator.
Fig. 6-2. Always tighten
regulator connection nuts
with a wrench.
Fig. 6-1. Always crack
cylinder valves, to blow out
dust and dirt from the
outlets.
2
