Metrohm 772 Pump Unit - Manual (Page 17)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
3 Installation
772 Pump Unit
￭￭￭￭￭￭￭￭ 9
liquid flows evenly. After a run-in period, correct the setting again if
necessary.
Note
Do not clamp the pump tubing too tightly or apply too much pres-
sure, as this causes greater wear to the pump tubing and the
pump will generate excessive pump pressure.
3.2.2 Installing the inlet tubing and outlet tubing
As the inlet tubing and outlet tubing, two different tubing types are avail-
able. Both tubings are included in the scope of delivery .
￭ PVC tubing (6.1801.120), 2 x 2 m
￭ PTFE tubing (6.1812.000), 1 x 4 m
Note
Which of the two tubings to use depends largely on the solvent used.
PVC tubing is more flexible and has the advantage of making less noise
during the pumping operation. It must be noted that the PVC tubing is
not resistant to solvents.
Install the inlet tubing and outlet tubing as follows:
1 Cut the inlet tubing and outlet tubing to the suitable length.
2 Connect the tubings to the tubing olives of the pump tubing using
union nuts.
Figure 5 Connecting the tubings