1 Installing the GC
Installation and First Startup 29
3 Install the regulator onto the compressed gas cylinder main fitting.
• Check the thread type. Some regulators use left-hand thread fittings. For left-handed
threads, the nut will have a groove in it.
4 Purge the air from the regulator by repeating the following procedure 5 times:
a Fully close the regulator knob, then open the main tank valve.
b Turn the regulator knob fully counter-clockwise to open the tank main valve,
pressurizing the primary side of the regulator.
c Turn OFF the tank main valve.
d Slowly turn the regulator knob clockwise to release (“bleed off”) the gas pressure.
e Close the regulator knob.
The image below illustrates a typical pressure regulator installation. In the example shown
below, which uses an optional shutoff valve, open the shutoff valve and leave open during
purging.
Groove indicates
left-hand thread
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