Maintenance - ProMinent Hydro/4 Operating Instructions Manual

9

Maintenance

Safety information
WARNING!
ATEX pump in area at risk from explosion
– Generally check the proper operation of the system, par‐
ticularly of the power end and bearings, by regular moni‐
toring (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, in particular:
– For ATB type motors: "EAY 90S/4l-11 II 2G Ex e II
T3" on page 17.
– For HEW type motors: "DEx 90 SH/4 K II 2G Ex de
IIC T4" on page 48.
– For ATB type motors: "CD 90 L1 - 4 I II 2G Ex de IIC
T4" on page 44.
– Only for an independently fitted motor: 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, as soon as unac‐
ceptable wear is detected. (The nominal service life
cannot be calculated with lubricated bearings).
– Only use genuine spare parts as replacements.
– Only perform tests and repairs in compliance with DIN
EN IEC 60079-17 and only permit "experienced per‐
sonnel who have the requisite knowledge" to perform the
work.
– These measures constitute the minimum protective
measurements stipulated by ProMinent. It is the duty of
the operator to eliminate any other dangers identified by
appropriate measures.
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.
Maintenance
39