SIGMA S2Ba - Manual (Page 30)

Page 30 Pr o Minent ®
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4 Start-up/Maintenance
WARNING
• For all metering pumps for metering inflammable media applies: Starting up and
emptying only supervised by a competent person.
IMPORTANT
Observe the safety notes provided in Section 1.
4.1 Start-up
All general guidelines in the accompanying ”General operating instructions ProMinent ®
motordriven metering pumps and hydraulic accessories” apply.
Diaphragm pumps with mechanically actuated diaphragm: no additional measures necessary,
however, version with diaphragm rupture indicator, version Ex“i”*, must be used on principle.
For all metering pumps for metering inflammable media applies: starting up and emptying only
supervised by a competent person.
Inflammable media may only be lifted with stainless steel liquid ends. - For exceptional cases,
where this is not possible, also PTFE with carbon may be used, our versions TT_ are made of
conductive plastics. In this case, special attention must be paid by the user due to the lower
mechanical stability.
4.2 Maintenance
WARNING
• EX-pump only: Wear parts (diaphragms, bearings etc.) of metering pumps used in
potentially explosive atmospheres must be replaced after having completed 90% of their
nominal product life.
• The lubricant supply must be regularly checked for lubricated pumps, for instance by
checking the fill level, visual inspection for leakages etc.
• EX-pump only: check that the pressure relief valve downstream from the pump is
functioning correctly!
The pressure relief valve must prevent the gearbox from being overloaded and
overheating in explosion-threatened workplaces!
• The proper general function, in particular of the drive, must be safeguarded by regular
inspections (leakages, noises, temperatures, possible discoloration due to excess
temperatures....).
• Use original spare parts should exchange become necessary!
• EX-pump only: When cleaning plastic parts, attention must be paid to not generating any
electrostatic charge by rubbing excessively. - see danger sign.
• EX-pump only: metering pumps and their peripheral equipment must be serviced by
specially trained or authorised personnel!
IMPORTANT
After loosening the liquid end screws (e.g. to change the valves or diaphragm), the screws
must be retightened clockwise to the specified tightening torque.
What requires maintenance?
• Secure fit of liquid end screws.
• Secure fit of metering lines (intake and delivery sides).
• Secure fit of head valve and intake valve.
• Leakage hole at end disc for moisture (indicates possible diaphragm failure).
• Operate pump continuously for a short period of time in order to check whether it delivers
correctly.
Start-up/Maintenance