SyriXus Series Pumps Installation and Operation Guide
Section 2 Fluid System Connections and Accessories
2-11
EAR99 Technology Subject to Restrictions Contained on the Cover Page
2.4 Temperature and
Pressure
Controls
Some applications, such as those with very low flows, may require
additional measures to maintain steady rates.
2.4.1 Temperature
Control Jacket
The optional cylinder temperature control jacket assists in main-
taining cylinder temperatures (-30 to 100 °C) by circulating liquids,
such as water or water/ethylene glycol solution, through the 1/4”
upper and lower hose connectors.
WARNING
If hot fluid is circulated in the temperature control jacket, the
jacket surfaces will become hot. Use thermal protection if the
thermal solution is greater than 25 °C (95 °F)
Figure 2-8
System with temperature control jacket installed
A temperature control jacket is very useful for SFC applications where
cylinder cooling facilitates filling with fluids such as liquid CO
2
. The
jacket can also be used with a circulating temperature-controlled bath
to keep the fluid inside the pump at a constant temperature. This may
be necessary when operating at very low flow rates (below
500 µL/min), where temperature fluctuation can cause flow variations.
When pumping gases, especially those that change phase during com-
pression (like CO
2
or alkane gases), a thermal jacket is recommended
to remove the heat buildup resulting from compression work. This
heat buildup can cause poor refills and difficulties in maintaining
working fluid parameters such as density. Typically the temperature
control jacket fluid is maintained at a temperature below room tem-
perature, but the exact temperature chosen would be application
dependent.
U
ser-supplied
devic
e
(Extruder
Reactor
Rock Core
Etc.)
Syringe P
ump
Circulating
bath
CO
2
Dip tube
T
.C.
Jack
et
CO
2
connection kit
