Thermo Scientific Vanquish VH-P10-A-02, Operating Manual

Page: 163 / 238

7 • Maintenance and Service
Vanquish Pumps (VH-P10-A-02) Operating Manual Page 163
7.8 Check Valves
Follow the sequence of steps for the maintenance procedure that you
want to perform:
• To replace the inlet check valves, see the next section.
•
To replace the outlet check valves, see section 7.8.2, page 165 .
• To clean the check valves, see section 7.8.3, page 166 .
7.8.1 Replacing the Inlet Check Valves
The picture shows the parts that must be removed.
Figure 67: Replacing the inlet check valves
When
Damage of check valve or leaky check valve
Parts required
Inlet check valve
Additional items required
• Solvent suitable for purging to flush out harmful substances
• Solvent suitable for your application
Preparations
1. To flush out harmful substances, purge the pump with an
appropriate solvent.
2. Turn off the pump flow and wait until the system pressure is down
to zero.
No. Description
1 Inlet assembly, pump head
2 Inlet check valves
3 Pump head, with
3a Locating pin for inlet assembly