6 Maintenance
Interval Maintenance work Personnel
Quarterly*
n Check the metering diaphragm for damage** - refer to
"Repair".
n Check that the hydraulic lines are fixed firmly to the
liquid end.
n Check that the suction valve and discharge valve are
correctly seated.
n Check the leak-tightness of the entire liquid end - partic‐
ularly around the leakage hole.
n Check that the flow is correct: Allow the pump to prime
briefly - turn the multifunction switch briefly to "100 %".
n Check that the electrical connections are intact
n Check the integrity of the housing.
n Check that the dosing head screws are tight
Technical personnel
* Under normal loading (approx. 30 % of continuous operation)
Under heavy loading (e.g. continuous operation): Shorter intervals.
** For feed chemicals which particularly load the diaphragm, e.g. those containing abrasive addi‐
tives, check the diaphragm frequently.
Tightening torque
Data Value Unit
Tightening torque for screws: 4.5 ... 5.0 Nm
Maintenance
14
Mahar Fan Abzar
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