threads. Start the PTFE tape on the first thread leaving a slight section of
the chamfer exposed as shown in the figure above. Make sure the tape does
not overlap the end of the fitting. As the tape is wrapped in the direction of
the thread spiral, pull tightly on the end of the tape so that the tape conforms
to the threads. Apply at least 2 but no more than 3 layers of tape to the
threads. Cut off excess tape, and press the end firmly into the threads.
d. CAPTURED VENT SPRING CASE. Some regulators have captured
vent spring cases. If you are using corrosive, toxic or flammable
gases, be sure tso connect suitable tubing from the vent fitting to a safe
discharge area. Consult instructions for captured vent kit for installation.
e. RELIEF VALVE. Some regulators are equipped with a relief valve. The
purpose of a relief valve is to protect the regulator and it components.
If there is pressure sensitive equipment downstream of the regulator
it is recommended that a relief valve be installed in the line to protect
this equipment. If you are using toxic, corrosive, or flammable gases,
it is recommended that the exhaust from the valve be piped to a safe
discharge area.
f.
PURGE DEVICES (Optional). If your regulator includes a purge, review
the safety operation in the specific instruction manual for your regulator.
Purge devices are highly recommended when using toxic or corrosive
gases.
OPERATION
Read the "Safety" and "Installation" sections before operating your equipment.
2.1 It is advised that high purity systems be thoroughly purged before use.
2.2 The regulator adjusting knob should be turned fully counterclockwise (see
1.3) and the outlet valve should be closed (see 1.4).
2.3 Put on safety glasses and gloves.
2.4 Position yourself with the cylinder between you and the regulator. Keep
hands off the regulator while opening the cylinder valve.
2.5 To avoid damage to regulator parts, slowly open the cylinder valve. Observe
the high pressure gauge for a rise in pressure up to full cylinder pressure.
2.6 Observe all connections for leaks.
a. An approved leak detection solution may be applied to the connections,
if compatible to your usage. Leaks are indicated by bubbling.
b. To further check for leaks, or if you cannot use the leak detection
solution, reclose the cylinder valve for five minutes, and observe the
high pressure gauge for a drop in pressure. If so indicated, recheck the
CGA connection and all other high pressure port connections.
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