KRAL EKL 11, Operation Instructions Manual

Page: 29 / 40

12 Servicing
11.4 Maintaining the strainers
11.4 Maintaining the strainers
Personnel qualification:
o
Fitter
Personal protective equipment:
o
Work clothing
o
Protective gloves
o
Safety boots
1. Check the strainers visually and acoustically every four weeks.
2. In the case of a clear pressure drop clean the strainers
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Servicing, Page 29.
12 Servicing
12.1 Dangers during servicing
The following safety instructions must be observed strictly:
o
Have all work carried out only by authorized qualified personnel.
o Before beginning work on the pump station ensure that the electrical power supply is deenergized
and is secured against being switched back on.
o Before beginning work, let the pump station cool down slowly to the ambient temperature. Avoid
rapid temperature changes.
o Pumped liquids can be hot, poisonous, combustible and caustic. Use corresponding protective
equipment.
o
Ensure that the pump station is depressurized and that shut-off devices are not operated uncon-
trolled.
o
Collect any discharging pumped liquid safely and dispose of it in an environmentally compatible
manner in accordance with the applicable local regulations.
o
Ensure that the collection tank for discharging pumped liquids is sufficiently large.
o
Observe the tightening torques
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Appendix, Page 38.
o
Observe the operating instructions and data sheets of the components.
12.2 Signs of wear
The following table lists signs of progressive wear of individual station elements:
Finding Cause Elimination
Increased running noises Incipient damage to bearing Replace the pump.
Increased leaking Incipient damage to seal Replace the shaft seal.
Deposits at the shaft seal Low-volatile liquids Clean the shaft seal.
Increased play in the coupling Advanced wear of the coupling
intermediate ring Replace the coupling inter-
mediate ring.
Reduction in the delivery rate or
pressure under constant
operating conditions Advanced wear of screws and
housing
Replace the pump.
Increased pressure drop at the
strainer Soiling of the strainers Clean the strainer.
Tab. 15: Signs of wear
12.3 Servicing the pump station
Personnel qualification: o Fitter
Personal protective equipment: o Work clothing
o Face protection
o Protective gloves
o
Protective helmet
Aids:
o
Collection tank
Operation instructions OIK 10en-GB Edition 2021-06 29