Tweco 181i Thermal Arc Fabricator - Manual (Page 35)

Fabricator 181i
Manual 0-51 91 3-5 INSTALLATION, OPERATION AND SETUP
!
WARNING
Use the regulator for the gas and pressure
for which it is designed. NEVER alter a
regulator for use with any other gas.
NOTE
Regulators purchased with open 1/8”, 1/4”,
3/8”, or 1/2” NPT ports must be assembled
to their intended system.
1. Note the maximum inlet pressure stamped
on the regulator. DO NOT attach the regulator
to a system that has a higher pressure than
the maximum rated pressure stamped on the
regulator.
2. The regulator body will be stamped “IN” or
“HP” at the inlet port. Attach the inlet port to
the system supply pressure connection.
3. Wrap pipe threads with Teflon tape 1 1/2 to 2
turns to effect a seal. If other sealants are used,
they must be compatible with the gas that will
be used in the system.
4. If gauges are to be attached to the regulator
and the regu lator is stamped and listed by a
third party (i.e. “UL” or “ETL”). The following
requirements must be met:
a) Inlet gauges over 1000 PSIG (6.87 mPa)
shall conform with the requirements of UL
404, “Indicating Pressure Gauges for Com-
pressed Gas Service.”
b) Low pressure gauges must be UL recognized
for the class of regulator they are being used
on according to UL252A.
!
WARNING
DO NOT use a regulator that delivers
pressure exceeding the pressure rating
of the downstream equipment unless
pro visions are made to prevent over-
pressurization (i.e. system relief valve).
Make sure the pressure rating of the down-
stream equipment is compatible with the
maximum delivery pressure of the regulator.
5. Be sure that the regulator has the correct
pressure rating and gas service for the cylinder
used.
6. Carefully inspect the regulator for damaged
threads, dirt, dust, grease, oil, or other flammable
substances. Remove dust and dirt with a clean
cloth. Be sure the inlet swivel filter is clean and
in place. Attach the regulator (Figure 3-2) to the
cylinder valve. Tighten securely with a wrench.
!
WARNING
DO NOT attach or use the regulator if oil,
grease, flamma ble substances or damage is
present! Have a qualified repair technician
clean the regulator or repair any damage.
Art # A-09845
Figure 3-2: Regulator to Cylinder Valve
7. Before opening the cylinder valve, turn the
regulator adjusting screw counterclockwise until
there is no pressure on the adjusting spring and
the screw turns freely.
8. Relief Valve (where provided): The relief valve is
designed to protect the low pressure side of the
regulator from high pres sures. Relief valves are
not intended to protect down stream equipment
from high pressures.
!
WARNING
DO NOT tamper with the relief valve or
remove it from the regulator.
!
WARNING
Stand to the side of the cylinder opposite the
regulator when opening the cylinder valve.
Keep the cylinder valve between you and the
regulator. For your safety, NEVER STAND
IN FRONT OF OR BEHIND A REGULATOR
WHEN OPENING THE CYLINDER VALVE!