ProMinent DULCO flex Control-DFYa Operating Instructions Manual page 76

Maintenance
Maintenance intervals
Interval Maintenance work
Quarterly* Check the pump hose for damage** - refer to
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the pump hose' on page 77 .
Clean running surface in the dosing head and rotor rollers.
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You may need to carefully but fully remove any adhered hose residue with
a plastic or wooden scraper. You can also use the green side of a house‐
hold cleaning sponge (e.g. Scotch sponge).
Check that the hydraulic lines are fixed firmly to the liquid end.
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Check the leak-tightness of the entire liquid end.
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Remove the hose rupture sensor (option) and test with water.
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Check that the front cover is fixed in place.
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Check that the flow is correct: Press
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prime briefly.
Check that the electrical connectors are intact.
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Check the reduction gear system for any escaping oil.
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Check the integrity of the housing.
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Expected service life of the pump hose
76
Ä Chapter 14.1 'Replacing
[Priming] to allow the pump to
* Under normal loading (approx. 30% of continuous operation).
Under heavy-duty loading (e.g. continuous operation): Shorter intervals.
** Check the pump hose more frequently with feed chemicals that put par‐
ticular pressure on the pump hose, e.g. those containing abrasive addi‐
tives or oxidation agents.
Determining the service life of the pump hose
When starting to pump, regularly check the pump hose
for wear - do this several times a day if necessary. The
service life and thus the replacement interval for the
pump hose can be derived from the collected information
and experience.
You can enter the value for this change interval as a
'Hose interval' in the 'Hose' menu and will be warned
after it has expired - Ä 'Hose service in' on page 70.
The following have a negative impact on the service life of the pump hose:
High back pressure
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High degree of compression
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High speed
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High temperature
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Exposure to chemicals.
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Personnel
Technical personnel