11 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!
Warning of hazardous feed chemical
Should a dangerous feed chemical be used: it may
escape from the hydraulic components when
working on the pump, material failure or incorrect
handling of the pump.
– Take appropriate protective measures before
working on the pump (e.g. safety glasses,
safety gloves, ...). Adhere to the material safety
data sheet for the feed chemical.
–
Drain and flush the liquid end before working
on the pump.
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic com‐
ponents 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 unauthorised persons.
–
Depressurise the system before commencing
any work on hydraulic parts.
Interval Maintenance work
10 000 operating hours Replace the additional diaphragms - refer to the "Repair" chapter.
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 discharge valve and suction valve are fitted tightly.
n Check the leak-tightness of the entire liquid end.
n Check that the flow is correct: Allow the pump to run briefly at maximum
stroke rate - if fitted, briefly press the push-button or key switch.
n Check that the electrical connectors are intact.
n Check the integrity of the housing.
n Check that the dosing head screws are tight.
* Under normal loading (approx. 30% of continuous operation).
Under heavy loading (e.g. continuous operation): Shorter intervals.
** Check the metering diaphragm frequently with feed chemicals
that put particular pressure on the diaphragm, e.g. those containing
abrasive additives.
Standard liquid ends:
Maintenance
38
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