8 Startup/shutdown of a mzr-pump
Operating manual mzr-7240
Last update: March 2019
Technical data subject to change without prior notice!
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8
Startup/shutdown of a mzr-pump
8.1
Preparing for operation
After the liquid supply system had been completed, please check once again
the operating conditions of the micro annular gear pump as according to the
following points:
−
Are the inlet and outlet tubes correctly connected?
−
Is the entire liquid supply system clean - that means free of particles, foreign
bodies, pollution or swarf?
−
Has a filter been installed on the suction side?
−
Has a sufficient amount of the right liquid been supplied?
−
The pump does not run the risk of a longer dry operation?
−
The entire liquid supply system has been checked for leakage?
−
Is it possible to stop the pump by an emergency switch if an unexpected
malfunction occurs at the startup?
8.2
Startup of the micro annular gear pump
Switch on the voltage supply. The micro annular gear pump can now be put
into operation by turning on the potentiometer knob or by sending a nominal
external voltage signal.
Start the filling in of the pump at low or middle speed (1000 - 3000 rpm).
Warning
Avoid dry operation of the pump over a longer time. The pump should be
filled in before it is put to operation.
8.3
Flushing procedure after use
After each service the micro annular gear pump should be carefully flushed
with a non-corrosive, filtered and particle-free flushing liquid (see table 28 and
table 29). During flushing procedure the pump should operate at a speed of
about 3000 rpm
and if possible against a low pressure (that can be obtained by
using a restrictor, a capillary or similar). The flushing liquid must be compatible
with the delivered liquid and suitable for solving the remaining liquid rests.
Depending on the application for example water, or isopropanol may be used.
If you have doubts whether a particular liquid is suitable for this function or
not, please ask the manufacturer of the liquid or HNP Mikrosysteme.