Maintenance
Maintenance intervals
34
Stepper Motor-driven Diaphragm Dosing Pump
MEMDOS SMART LB
© Lutz-Jesco GmbH 2014
Operating Instructions
BA-10100-02-V02
12 Maintenance
Lutz-Jesco dosing pumps are produced to the highest quality standards
and have a long service life. Nevertheless, some of their parts are
subject to wear due to operation (e.g. diaphragms, valve seats, valve
balls). This means that regular visual inspections are necessary to
ensure a long operating life. Regular maintenance will protect the
dosing pump from operation interruptions.
12.1 Maintenance intervals
This table gives you an overview of maintenance work and the intervals
at which you must carry it out. The next few chapters contain instruc-
tions for carrying out this work.
DANGER
Danger to life due to electric shock
Live parts can inflict fatal injuries.
Before carrying out any maintenance work, always disconnect
the dosing pump from the power supply.
Secure the dosing pump from accidental power-up.
WARNING
Caustic burns or other burns through dosing media!
While working on the dosing head, valves and connections, you may
come into contact with dosing media.
Use sufficient personal protective equipment.
Rinse the dosing pump with a medium (e.g. water) which does
not pose any risk.
Release pressure in hydraulic parts.
Never look into open ends of plugged pipelines and valves.
WARNING
Caustic burns or other burns through dosing media!
After connecting the mains supply, residual dosing media in the
dosing head can spray out.
Before connecting the mains supply, connect the dosing lines.
Check that all the screw connections have been tightened cor-
rectly and are leak-proof.
CAUTION
Danger of personal injury and material damage!
The dosing pump can generate a pressure that is many times the
rated one. The dosing medium can escape in the case of material
failure or wear on the dosing head, the connection pipe or the seals
that are used.
Carry out maintenance work at the recommended intervals.
CAUTION
Increased risk of accidents due to insufficient qualifica-
tion of personnel!
Dosing pumps and their accessories may only be installed, operated
and maintained by personnel with sufficient qualifications. Insuffi-
cient qualification will raise the risk of accidents.
Ensure that all action is taken only by personnel with sufficient
and corresponding qualifications.
Prevent access to the system for unauthorised persons.
Maintenance work to be carried
out
Frequency
Check that piping is seated firmly
Regularly
Check that suction and discharge
valves are seated firmly
Regularly
Clean suction and discharge valves
Regularly
Check that electrical connections
are not damaged
Regularly
Tighten up dosing head bolts
Regularly
Before initial commissioning
After each diaphragm
change
Check diaphragm for leakage due
to rupture
Regularly
Check that the installed accesso-
ries are functioning correctly
Regularly
Check the dosing pump for
unusual noises during operation,
unusual temperatures or smells
Regularly
Replace parts that are subject to
wear (diaphragms, valves, seals,
etc.)
When unacceptable levels of
wear are detected
Rinse out and clean the dosing
pump
Before changing diaphragms
Before taking out of service
for a long period of time
After feeding aggressive,
sticky, crystallising or
contaminated liquids
Table 12-1: Maintenance information and maintenance intervals
