Dionex UltiMate 3000 Series, Руководство по эксплуатации

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UltiMate 3000 Series:
SD, RS, and BM Pumps
Page 128 Operating Instructions
7.4 Replacing the Check Valve Cartridges
Two check valves are installed in the pump head: inlet check valve and outlet check valve
(

Fig. 34, page 130, nos. 11 and 13).
Description Part No.
Check valve cartridge (identical for inlet valve nut and outlet valve nut)
for
SD and BM pumps (sapphire)
RS pumps (ceramics)
6041.2300
6041.2301
Tip: For SD and BM pumps, the ceramics cartridge is available as an option. When
using acetonitrile, valve problems may be observed, indicated, for example, by
increased pulsation. In these cases, consider replacing the sapphire cartridges with the
ceramics cartridges.
Valve nut kit (inlet check valve nut and outlet check valve nut) for
SD and RS pumps
BM pumps
6040.7007
6042.7007
1. If necessary, purge the pump to remove toxic solvents.
2. Set the pump flow rate to 0. Wait until the system pressure is down to zero.
3. Put on a pair of clean room gloves to prevent contamination on the valve parts. Even
minute particles may cause damage to the system and result in poor pump
performance.
4. Disconnect the tubing connections from the inlet and outlet check valves.
5. Loosen the check valve nuts, by using a 13 mm open-end wrench, and remove them
from the pump head.
6. Hold the nuts over your hand and turn them upside down, allowing the cartridges to
drop into your hand.
7. Insert a new cartridge into the check valve nut. Make sure that you insert the cartridge
in the direction of solvent flow, as indicated by the arrow on the cartridge.
8. Screw the check valve into the pump head and tighten the check valve (recommended
torque: 10 Nm).
Tighten the inlet check valve hand-tight, turn the bottom part so that the inlet opening
points backward (toward the interior front panel), and then use an open-end wrench
(size 13 mm) to tighten the nut until the inlet opening is on the left (about one-quarter
turn).