Thermo Scientific Dionex, Руководство оператора

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10 • Service
Doc. 065250-06 03/2020
125
NOTE The inlet check valve housing
has a 1/4-28 port. The outlet
check valve housing has a 10-
32 port (see
Figure 10-2 ).
Figure 10-2. Check Valve Ports
6. Remove the old check valve cartridges from the inlet and outlet check valve
housings.
7. With the double-hole end of a new
cartridge (P/N 047747) facing up, drop
the cartridge into the
inlet check valve
housing (see Figure 10-3 ).
8. With the single-hole end of a new
cartridge (P/N 047747) facing up, drop
the cartridge into the outlet check valve
housing (see
Figure 10-3 ).
Figure 10-3. Check Valve Assemblies
NOTE The pump cannot operate properly unless the check
valve cartridges are installed in the housings in the
correct orientation. Liquid enters the check valve
through the large single hole and exits through the small
double holes.
9. Install the inlet check valve assembly on the bottom of the pump head. Install
the outlet check valve assembly on the top of the head.
10. Tighten the check valves finger-tight, and then use a wrench to tighten an
additional one-quarter to one-half turn.
11. Reconnect the liquid lines and the power cord. Turn on the Dionex Integral
main power.
Overtightening may damage the pump head and check valve housing
and crush the check valve seats.
Inlet Check Valve Outlet Check Valve
1/4-28 Port
10-32 Port
Double-hole
Single-hole
Flow
Flow
Inlet Check Valve Outlet Check Valve