xi
INTRODUCTION
When assembling threaded connections, clean and smooth seats
where necessary before tightening. If connection leaks, disas-
semble, clean, and retighten using properly fitting wrench.
Use a CGA adapter (available from supplier) between cylinder
and regulator, if required. Use two wrenches to tighten adapter
marked RIGHT and LEFT HAND threads.
Regulator outlet (or hose) connections may be identified by right
hand threads for oxygen and left hand threads (with grooved hex
on nut or shank) for fuel gas.
Drain regulator of residual gas through suitable vent before
opening cylinder (or manifold valve) by turning adjusting screw
clockwise. Draining prevents excessive compression heat at high
pressure seat by allowing seat to open on pressurization. Leave
adjusting screw engaged slightly on single-stage regulators.
Do not stand in front of regulator while opening cylinder valve.
Open cylinder valve slowly so that regulator pressure increases
slowly. When gauge is pressurized (gauge reaches regulator
maximum) open cylinder valve fully to seal stem against possible
leak when using oxygen and inert gases. For fuel gas, open less
than one turn to permit quick emergency shutoff.
Use pressure charts (available from supplier) for safe and effi-
cient, recommended pressure settings on regulators.
Check for leaks on first pressurization and regularly thereafter.
Brush with soapy solution (one capful of liquid detergent per
gallon of water); bubbles indicate leak Clean off soapy water
after test; dried soap is combustible.
Remove leaky or defective equipment immediately for repair.
Close gas supply at source and drain gas when leaving equip-
ment unattended.
Do not use rope staging support for welding or cutting operation;
rope may burn.
Magnetic fields from high currents can affect pacemaker opera-
tion. Persons wearing electronic life support equipment (pace-
makers) should consult with doctor before going near arc weld-
ing, gouging, or spot welding operations.
Proper Connections
(continued)
Pressurizing Steps
Electronic Life Support
Devices (Pacemakers)
IMPORTANT SAFETY PRECAUTIONS (continued)
Summary of Contents for 400 GTSW AC/DC
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