Maintenance; Repair - ProMinent 1026768 Mode D'emploi

ProMinent
®
WARNING
The housing material and the ambient temperatures or the metering media temperature limit the
maximum operating pressure!
Filling pressure of the hose diaphragms
60 % of the determined operating pressure at the installation site
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Maintenance

CAUTION
• Always wear suitable protective equipment if hazardous or unknown metering media are metered!
Observe the safety data sheets of the metering media!
• Pre-load the hose diaphragm of the in-line dampeners in regular intervals!
It may burst if the gas cushion is insufficient!
Maintenance intervals
Carry out maintenance in regular intervals depending on the metering medium, the installation, and the
operating conditions.
Regularly check
- the tightness of the fittings and of the wall bracket, if any.
- the leak-tightness of the in-line dampener
- the dampening effect with manometer close to the in-line dampener.
Pre-loading of the in-line dampener
See Chap. 6 "Commissioning"
8

Repair

WARNING
• Always wear suitable protective equipment if hazardous metering media are metered!
Observe the safety data sheets of the metering media!
• Depressurise the in-line dampener!
• Depressurise the hose diaphragm!
• Empty the pump hose and rinse using a neutral medium, if required!
Observe the safety data sheets of the metering medium!
If the hose diaphragm leaks, it may be replaced as follows:
Disconnect the in-line dampener from the system as regards pressure.
Depressurise the hose diaphragm through the air valve (remove rubber cap, remove valve cap and use the
valve cap to press onto the tappet at the centre of the valve)
Depressurise the in-line dampener through a relief valve
Remove the in-line dampener
Empty the in-line dampener and rinse with a neutral medium, if required
Unscrew the in-line dampener at both ends
Remove the old hose diaphragm
Ensure that all sealing surfaces are clean and smooth, also those of the new hose diaphragm
Fold the new hose diaphragm as shown (see Fig. 3)
Press the hose diaphragm with one hand into the housing (see Fig. 3) and unfold
Assemble the in-line dampener in the reverse order
Tighten the union nut a bit more than 1/4 turn (from 6 to 9 ... 10 o'clock or 2.5 Nm)
Re-install the in-line dampener into the system
Commission the in-line dampener as described in Chap. 6
Commissioning / Maintenance / Repair
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