Tweco 181i Fabricator - Manual (Page 36)

Fabricator 181i
INSTALLATION, OPERATION AND SETUP 3-6 Manual 0-5191
9. Slowly and carefully open the cylinder valve
(Figure 3-3) until the maximum pressure shows
on the high pressure gauge.
Art # A-09828
Figure 3-3: Open Cylinder Valve
10. On all cylinders, except acetylene, open the
valve completely to seal the valve packing. On
gaugeless regulators, the indicator will register
the cylinder contents open.
11. On acetylene cylinders, open the valve 3/4 of a
turn and no more than 1-1/2.
!
WARNING
Acetylene delivery pressure must not exceed
15 PSIG (103 kPa) or 30 PSIG (207 kPa).
Acetylene can dissociate (decompose with
explosive violence) above these pressure
limits.
CAUTION
Keep the cylinder valve wrench, if one is
required, on the cylinder valve to turn OFF
the cylinder quickly, if necessary.
12. Attach the desired downstream equipment.
3.07 Leak Testing the System
Leak test the system before putting into operation.
1. Be sure that there is a valve in the downstream
equipment to turn OFF the gas flow.
2. With the cylinder valve open, adjust the regulator
to deliver the maximum required delivery
pressure.
3. Close the cylinder valve.
4. Turn the adjusting screw/knob counterclockwise
one turn.
a) If the high-pressure gauge reading drops,
there is a leak in the cylinder valve, inlet
fitting, or high-pressure gauge.
b) If the low-pressure gauge drops, there is a
leak in the down stream equipment, hose,
hose fitting, outlet fitting or low-pressure
gauge. Check for leaks using an approved
leak detector solution.
c) If the high-pressure gauge drops and the
low-pressure gauge increases at the same
time, there is a leak in the regulator seat.
d) If the regulator requires service or repair,
take it to a qualified repair technician.
5. Once leak testing has been performed and there
are no leaks in the system, slowly open the
cylinder valve and proceed.
!
WARNING
If a leak has been detected anywhere in
the system, dis continue use and have
the system repaired. DO NOT use leaking
equipment. Do not attempt to repair a leaking
system while the system is under pressure.
3.08 When You Finish Using the
Regulator
1. Close the cylinder valve.
2. Open the valve on the downstream equipment.
This drains all pressure from the system.
3. Close the valve on the downstream equipment.
4. Turn the adjusting screw counterclockwise to
release the ten sion on the adjusting spring.
5. Check the gauges after a few minutes for
verification that the cylinder valve is closed
completely.
3.09 Storage of the Regulator
When the regulator is not in use and has been removed
from the cylinder, it should be stored in an area where
it will be pro tected from dust, oil, and grease. The inlet
and outlet should be capped to protect against internal
contamination and prevent insects from nesting.