SyriXus Series Pumps Installation and Operation Guide
Section 2 Fluid System Connections and Accessories
2-7
EAR99 Technology Subject to Restrictions Contained on the Cover Page
2.2.7 Cylinder Washing -
Nitrogen Purge
All pumps that do
not
have a wash gland are equipped with a purge
connector tube near the top of the pump body. The purge connector
enables the pump cylinder beneath the piston to be purged with
nitrogen, reducing the presence of atmospheric oxygen below the
piston. This feature is most useful when pumping fluids that are flam-
mable. Figure 2-5 shows a typical connection to the purge tube on the
back of the pump.
To Purge with
Nitrogen
1. Attach gas supply by slipping the plastic tube over the purge
connector, as shown below.
2. Regulate the nitrogen supply to slightly above atmospheric pres-
sure.
Figure 2-5
Purge connector installation
2.2.8 Flushing Pumps
with External
Transducers
When changing pumped liquids in the Model 65x or other models with
external transducers, flush the pump to prevent cross-contamination
or difficulties with incompatible fluids.
In comparison to other SyriXus pumps, those with external trans-
ducers have a greater dead volume space due to transducer and tubing
differences. This dead volume space increases the possibility of
residual liquid being held in the pump. Also, the external transducer
may retain residual liquid. Dead volumes are listed in the specifi-
cation tables found in Section 1 "Introduction".
To flush the pump, remove the transducer and its tubing from the top
of the pump.
Caution
Never immerse the transducer in solvent.
Close-up of Nitrogen Purge Tube
