Maintenance
Maintenance intervals
33
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170502
BA-10010-02-V01
Solenoid-diaphragm dosing pump
MAGDOS LA / LD
Operating instructions
12 Maintenance
The products 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.
DANGER
Mortal danger from electric shock!
Live parts can inflict fatal injuries.
ð
Before carrying out any maintenance work, always disconnect
the dosing pump from the power supply.
ð
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.
ð
Use sufficient personal protective equipment.
ð
Rinse the dosing pump with a medium (e.g. water) which does
not pose any risk.
ð
Release pressure in hydraulic parts.
ð
Never look into open ends of plugged pipelines and valves.
WARNING
Danger of automatic start up!
The dosing pump does not have an ON/OFF switch and may start to
pump as soon as it is connected to the mains supply.
After connecting the mains supply, residual dosing media in the
dosing head can spray out.
ð
Before connecting the mains supply, connect the dosing lines.
ð
Check that all the screw connections have been tightened
correctly 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.
ð
Carry out maintenance work at the recommended intervals.
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 sections contain instructions
for carrying out this work.
Maintenance work to be carried out
Frequency
Check that piping is seated firmly
Regularly
Check that suction and pressure
valves are seated firmly
Regularly
Clean suction and pressure valves
Regularly
Check that electrical connections are
not damaged
Regularly
Tighten up dosing head bolts
n
Regularly
n
Before initial commission-
ing
n
After each diaphragm
change
Check diaphragm for leakage due to
rupture
Regularly (as long as no leak
monitoring system is
installed)
Check that the installed accessories
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
n
Before changing
diaphragms
n
Before taking out of
service for a long period
of time
n
After feeding aggressive,
sticky, crystallising or
contaminated liquids
Table 26: Maintenance information and maintenance intervals
12.2 Tighten up dosing head bolts
è
Tighten the dosing head bolts in diagonally opposite sequence with a
torque wrench.
The necessary torque is 180 Ncm.
Summary of Contents for MAGDOS LA
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