Vaporizer accessory for injection of LPG,
refrigerants andother Pressurized liquids
LPG and other pressurized liquids are
sometimes difficult tomeasure because
the liquid in the bottom of the container
has adifferent composition than thegas
above the liquid in the cylinder. If the liquid
is 99% propane and 1% butane for exam-
ple, the gasmay be 99.5% propane and
only .5% butane. This is because the va-
por pressure and boiling point of propane
and butane are different.
It is difficult to inject pressurized liquid into
theGC. Its easier to vaporize the liquid
and then inject it in a gaseous state.
To accomplish this, SRI offers theVaporiz-
er Accessory for the 8610CGC ( part#
8690– 9400 ). The vaporizer ismounted
between the ducts of the heated valve ov-
enwhich is normally installed on aSRI GC
configured for gas analysis.
TheVaporizer has two inlets and one out-
let. The liquid inlet leads to the vaporizer
heater while the regular inlet is intended for
sampleswhich are already a gas.
The regular sample inlet should be capped
off when the liquid inlet is being used.
When the regular inlet is used, leave the
cap off the liquid inlet toprevent theexpan-
sion volume from buffering the sample.
SRI TechSupport: 310-214-5092
Page 1
CommonPropane
Cylinder
