KSB CTN - Shutdown;Storage;Preservation; Measures to be Taken for Shutdown

6 Commissioning/Start-up/Shutdown
36 of 76
CTN / CTN-H
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Table18: Key
Symbol Description Unit
c Specific heat capacity J/kg K
g Acceleration due to gravity m/s²
H Pump discharge head m
T
f
Fluid temperature °C
T
O
Temperature at the casing surface °C
Pump efficiency at duty point -
Temperature difference K
6.2.3.2 Density of the fluid handled
The pump input power changes in proportion to the density of the fluid handled.
CAUTION
Impermissibly high density of the fluid handled
Motor overload!
▷ Observe the information about fluid density in the data sheet.
▷ Make sure the motor has sufficient power reserves.
6.2.3.3 Abrasive fluids
Do not exceed the maximum permissible solids content specified in the data sheet.
When the pump handles fluids containing abrasive substances, increased wear of the
hydraulic system, plain bearing and shaft seal are to be expected. In this case, reduce
the intervals commonly recommended for servicing and maintenance.
6.3 Shutdown/storage/preservation
6.3.1 Measures to be taken for shutdown
The pump (set) remains installed
ü Sufficient fluid is supplied for the functional check run of the pump.
1. For prolonged shutdown periods, start up the pump (set) regularly between
once a month and once every three months for approximately five minutes.
ð This will prevent the formation of deposits within the pump and the pump
intake area.
The pump (set) is removed from the pipe and stored
ü The pump has been properly drained and the safety instructions for dismantling
the pump have been observed. (ðSection7.4.1,Page43)
1. Spray-coat the inside wall of the pump casing, and in particular the impeller
clearance areas, with a preservative.
2. Spray the preservative through the suction nozzle and flanged bend.
It is advisable to then close the pump nozzles (e.g. with plastic caps or similar).
3. Oil or grease all blank parts and surfaces of the pump (with silicone-free oil and
grease, food-approved if required) to protect them against corrosion.
Observe the additional instructions. (ðSection3.3,Page13)