9
Maintenance
WARNING!
ATEX pumps in areas at risk from explosion
– Generally check that the system is working
properly, particularly the power end and bear‐
ings, by regularly monitoring it (for leaks,
noises, temperatures, smell....).
– Do not allow the pump to run hot due to a lack
of oil.
With lubricated metering pumps, regularly
check for the presence of lubricant, for
example by checking the liquid level, visual
leak control etc. If oil is leaking, examine the
leakage point immediately and eliminate the
cause.
– Check the correct operation of the relief valve
downstream of the pump. In premises at risk
from explosion, the relief valve should prevent
the gear from becoming overloaded and
becoming hot.
– Observe the enclosed operating instructions for
the Ex motor.
– Check / replace worn gear ring etc. of the
clutch.
– When cleaning plastic components, ensure
that no electrostatic charges are generated by
excessive friction.
– Prevent serious deposits of dust on the motor.
– Consider potential equalisation before you
approach any pump equipment that could be at
a different electrical potential (such as pipes or
tools).
– Only with stroke control motor: Wait 3 minutes
after switching off before opening the housing.
– Have wear parts, such as bearings, replaced
by ProMinent Service when there is an identifi‐
able incidence of unacceptable wear.
– Appropriate diagnostic equipment for bearing
damage is recommended for the premature
detection of bearing damage.
– Check whether the potential equalisation lines
are all sitting correctly with clean contacts. Use
the equipotential bonding drawings as an aid –
see Appendix.
– Check whether the earth lines are all sitting
correctly with clean contacts. Use the equipo‐
tential bonding drawings as an aid – see
Appendix.
– Only use genuine spare parts as replacements.
Safety information
Maintenance
51
