KRAL CKC, Operating Instructions Manual

Page: 26 / 40

11 Maintenance
10.5 Recommissioning
Behaviour of the pumped liquid Duration of the operation interruption
Short Long
o
Solids sediment Rinse the pump. Rinse the pump.
o
Congealed/frozen
o No corrosive burden
Heat or drain the pump. Drain the pump.
o Congealed/frozen
o Corrosive burden
Heat or drain the pump. 1. Drain the pump.
2. Preserve the pump.
o Remains liquid
o
No corrosive burden
– –
o
Remains liquid
o
Corrosive burden
–
1. Drain the pump.
2. Preserve the pump.
Tab. 9: Measures depending on the behaviour of the pumped liquid
Drain the pump via the pressure line, suction line, vent screws and screw plugs.
10.5 Recommissioning
10.5.1 Recommissioning the pump
Carry out all the steps as for the commissioning process,
Ä
Commissioning, Page 20.
11 Maintenance
11.1 Dangers during maintenance
The following safety instructions must be observed strictly:
o
Have all work carried out only by authorized qualified personnel.
o
Before beginning work, let the pump unit 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 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 operating instructions and data sheets of the components.
11.2 Required maintenance
The service life depends on the observance of the operating conditions of the pump and the require-
ments from the operating instructions of the components.
Component Required maintenance Cycle
Pump
o
Visual inspection
o
Acoustic inspection
4 weeks
Filter/strainer (system side)
o
Check of the suction-side pressure 2 weeks
Overflow valve
o
Function test ≤ 5 years
Tab. 10: Required maintenance
11.3 Ball bearing (inner bearing)
The ball bearings used are lubricated by the pumped liquid. Maintenance is therefore not required. The
manufacturer recommends renewing the ball bearings every 20,000 operating hours. When using the
pump in lubrication oil applications a bearings replacement at the latest after 5 years (40000 h) is
sufficient.
26 OIC 01en-GB Edition 2019-11 Operating instructions