ConnectingGasCylinders
Cut the copper tubing to the de-
sired length using the tubing cut-
ters and secure the nuts and fer-
rules to both ends of the tubing
(see our
Cutting Tubing
and
Using
Ferrules
documents for more infor-
mation). Stainless steel 1/8” tubing
can also be used, but it is harder
to cut and more expensive than
copper tubing.
Connect one end of the copper
tubing to the regulator outlet fitting
( snubber )and the other end to the
inlet fitting on the gas chromato-
graph.
It’s a good idea to momentarily
flush the tubing with gas before
connecting to the GC to blow out
any dust or liquids in the tubing.
It is recommended that the copper
tubing be coiled right before it con-
nects to the gas EPC. The end of
the copper tubing can be coiled
over any cylinder
-
like object (in the
picture to the right, a gas syringe is
used) with 4
-
6 coils being sufficient.
The coiling acts as a stress relief
and can prevent damage to the tub-
ing and EPC if the line is pulled on
or otherwise stressed.
Page4
