9
Maintenance
WARNING!
ATEX pumps in areas at risk from explosion
–
Generally check the proper functioning of the system,
particularly of the power end and bearings, by regular
monitoring (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 down‐
stream 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.
–
Only with pumps with a motor flange: replace worn gear
ring etc. of the clutch.
–
Only with add-on power end: replace worn gear ring/DZ
element of the clutch.
–
Check the seals of the pressure switch for leak-tight‐
ness.
–
When cleaning plastic components, ensure that no elec‐
trostatic charges are generated by excessive friction. -
see warning label.
–
Replace wear parts, such as bearings, when there is an
identifiable incidence of unacceptable wear. (The nom‐
inal service life cannot be calculated with lubricated
bearings.)
–
Only use genuine spare parts as replacements.
–
A diagnostic device for bearing damage is very useful for
the premature detection of bearing damage.
–
Carry out tests and repair in compliance with DIN EN
IEC 60079-17 and ensure that they are only performed
by "experienced personnel with the requisite knowl‐
edge".
–
These measures are deemed to be minimum protection
measures by ProMinent. It is the duty of the operator to
take appropriate measures to eliminate any further haz‐
ards known to him.
WARNING!
ATEX pump in area at risk from explosion
Static electricity can cause ignition sparks.
–
Always earth the discharge and suction lines first before
working on the pump.
WARNING!
Fire hazard with flammable media
Only with combustible media: These may start to burn when
combined with oxygen.
–
During filling and draining of the liquid end, an expert
must ensure that feed chemical does not come into con‐
tact with oxygen.
Safety information
Maintenance
40