13 Maintenance
WARNING!
It is mandatory that you read the safety information and
specifications in the "Storage, Transport and Unpacking"
chapter prior to shipping the pump.
WARNING!
Fire hazard with flammable media
Only with combustible media: These may start to burn when
combined with oxygen.
– During filling and draining of the liquid end, an expert
must ensure that feed chemical does not come into con‐
tact with oxygen.
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic components if
they are manipulated or opened due to pressure in the liquid
end and adjacent parts of the system.
– Disconnect the pump from the mains power supply and
ensure that it cannot be switched on again by unauthor‐
ised persons.
–
Depressurise the system before commencing any work
on hydraulic parts.
Third party spare parts for the pumps may lead to problems
when pumping.
–
Use only original spare parts.
–
Use the correct spare parts kits. In the event of doubt,
refer to the exploded views and ordering information in
the appendix.
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 fitted tightly.
n Check that the entire liquid end is leak-tight - particularly around the
leakage hole - refer to
Fig. 37.
n Check that the flow is correct: Press
[Priming]
to allow the pump to
prime briefly.
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.
** Check the diaphragm frequently with feed chemicals that put particular
pressure on the diaphragm, e.g. those containing abrasive additives.
Standard liquid ends:
Maintenance
66
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