Tweco 141i Fabricator - Manual (Page 35)

Fabricator 141i
Manual 0-51 45 3-5 INSTALLATION, OPERATION AND SETUP
!
WARNING
Use the flowmeter/ regulator for the gas and
pressure for which it is designed. NEVER
alter a flowmeter/ regulator for use with
any other gas.
NOTE
Flowmeters/ Regulators supplied with
5/8" -18 standard inert gas connections.
Flowmeters/ 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 flowmeter/ regulator. DO NOT attach
the flowmeter/ regulator to a system that has
a higher pressure than the maximum rated
pressure stamped on the flowmeter/ regulator.
2. The flowmeter/ regulator body will be stamped
“IN” or “HP” at the inlet port. Attach the inlet
port to the system supply pressure connection.
3. If gauges are to be attached to the flowmeter/
regulator and the flowmeter/ regulator 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 flowmeter/ regulator they are
being used on according to UL252A.
!
WARNING
DO NOT use a flowmeter/ 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
flowmeter/ regulator.
4. Be sure that the flowmeter/ regulator has the
correct pressure rating and gas service for the
cylinder used.
5. Carefully inspect the flowmeter/ 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 flowmeter/
regulator (Figure 3-2) to the cylinder valve.
Tighten securely with a wrench.
!
WARNING
DO NOT attach or use the flowmeter/
regulator if oil, grease, flamma ble substances
or damage is present! Have a qualified repair
technician clean the flowmeter/ regulator or
repair any damage.
Art # A-09845
Figure 3-2: Flowmeter/ Regulator to Cylinder
Valve
6. Before opening the cylinder valve, turn
the flowmeter/ regulator adjusting screw
counterclockwise until there is no pressure on
the adjusting spring and the screw turns freely.
7. Relief Valve (where provided): The relief valve is
designed to protect the low pressure side of the
flowmeter/ 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 flowmeter/ regulator.