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Monitoring during operation
1. During operation check the pump regularly for correct functioning, smooth and vibration-free running
abnormal noises and leaks.
2. If the pump has pumped for a long time without having moved water, the pump housing must be filled with
water, because the cups shrink after having run dry for a long time. Once the pump housing is filled with
water, the cups will slowly swell again so they are in contact with the cylinder.
3. Check whether the gland packing is leaking; it must be adjusted so one drop of water drips every five
seconds. Loosen the gland packing a bit if it drips more slowly and tighten it a bit if it drips more quickly.
4. The maximum permissible ambient temperature is 40 °C. The temperature of the bearings may not exceed
110 °C.
Note
Use for higher temperatures is only permitted after consultation with the supplier.
WARNING
In the event of a problem or incorrect functioning, stop the pump. Determine and
correct the cause before restarting the pump.
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