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7 The startup/shutdown of a pump
Operating manual mzr-2521 and mzr-2921
Last update: June 2019
Technical data subject to change without prior notice!
45
7
The startup/shutdown of a pump
7.1
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 or hoses 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 first start?
7.2
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 the potentiometer knob, by sending a nominal
external voltage signal or with the delivered software (see chapters 8, 9).
−
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 into operation.
7.3
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 26 / table 27).
During the flushing procedure the pump should operate at 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 be 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 liquid is suitable for this function or not, please ask the manufacturer
of the liquid or HNP Mikrosysteme.