SIGMA S2Ba - Manual (Page 31)

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Page 31 Pr o Minent ®
Maintenance intervals
General recommendation for maintenance intervals - every 3 months.
Shorter intervals are recommended if operated under load conditions (e.g. continuous operation).
The gear oil should be changed after approx. 5000 duty hours.
Gear oil ISO viscosity class VG 460, e.g. Mobil Gear 634,
ProMinent Order No. 555325 (Amount of oil approx. 0.5 l).
The metering diaphragm is a wearing part whose service life is dependent on following parameters:
• System backpressure.
• Operating temperature.
• Properties of medium to be metered.
The service life of the diaphragm is restricted in the case of abrasive media. In such cases, it is
recommended to check the diaphragm more frequently and to install a diaphragm failure monitor.
4.3 Replacement of wearing parts
Replacing diaphragm (see exploded diagrams in appendix!)
WARNING
• EX-pump only: metering pumps and their peripheral equipment must be serviced by
specially trained or authorised personnel!
• Always use original spare parts.
IMPORTANT
Flush liquid end first in the case of hazardous media. For this purpose, force water or a
suitable flushing agent through the intake connection of the liquid end with a wash bottle.
̈ Set stroke length to zero with the pump running. Switch off pump.
̈ Release the six screws holding the liquid end, detach liquid end together with screws.
̈ Release diaphragm from the push rod by jolting in counterclockwise direction and unscrew.
̈ Screw on new diaphragm until it is firmly seated on the push rod. Mount the dosing head with
screws such that the suction connection lies at the bottom (observe the flow through direction /
arrow marks on the valves). Switch on pump. Set stroke length to 100% and turn in screws
then tighten crosswise to 7.5 ± 0.5 Nm. Check pump for leaks at max. pressure.
Start-up/Maintenance