8 servicing the high-pressure pump, Servicing the high-pressure pump, Figure 16 – Metrohm 940 Professional IC Vario ONE/Proep 2 User Manual
Page 66: High-pressure pump – parts
5.8 Servicing the high-pressure pump
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940 Professional IC Vario ONE/Prep 2 (2.940.1120)
5.8
Servicing the high-pressure pump
Figure 16
High-pressure pump – parts
1
Pressure screw, short (6.2744.070)
Fastened to the outlet valve holder.
2
Outlet valve holder
3
Fastening screw
4
Pump head
5
Inlet valve holder
6
Pressure screw, short (6.2744.070)
Fastened to the inlet valve holder.
7
Eluent aspiration tubing connector
Consists of a coupling with a pressure
screw.
8
Pressure screw, short (6.2744.070)
Fastened to the pump output.
Maintenance interval
The following parts of the high-pressure pump have to be serviced at least
once per year:
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Inlet valve (6.2824.170)
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Outlet valve (6.2824.160)
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Piston seal (6.2741.020)
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Zirconium oxide piston (6.2824.070)
Maintenance tasks can also be carried out if the following problems occur:
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Unstable baseline (pulsations, flow fluctuations)