Dionex UltiMate 3000 Series, Руководство по эксплуатации

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UltiMate 3000 Series:
SD, RS, and BM Pumps
Page 144 Operating Instructions
7.5.3.4 Recommended Actions after Piston Seal Replacement
Observe the following recommendations when you have replaced the piston seals in the pump
head:
Tip : Pump performance and the seal life cycle depend directly on the actions
recommended in this section. Therefore, you should perform these actions
whenever you replaced the piston seals.

Allow new piston seals to run in.
a) Connect drain tubing to the purge outlet nozzle.
b) Open the purge valve (with an ISO-3100BM, observing the precautions on page 90).
c) Operate the pump for 15 minutes with isopropanol at a flow rate of 1 mL/min. Do not
deliver in circles.
d) Close the purge valve (turn the valve knob clockwise).
e) On the pump outlet, install a flow restrictor, for example, a capillary, that can generate
approximately 30 MPa at a flow rate of 1 mL/min.
f) Have the pump deliver isopropanol at 1 mL/min for another 30 minutes.
g) Depending on the pump type, check the static mixer or inline filter for indications of
blockage (

page 148 or 152).
h) Remove the capillary from the pump outlet and connect the pump to the system.

In rare cases, it may happen that new seals still show an increased leakage rate after
several hours of operation.
If leakage is observed with new piston seals, operate the pump for at least 2 hours at
35 MPa to run in the seals. (It does not help if you tighten the pump head screw more.)
Tip : If the piston seals do not yet seal sufficiently tight, try the following: Have
the pump build up high pressure (

page 154) and hold the pressure for
some minutes.

Never run the pump dry. Damage to the pistons and the piston seals could result.