KSB CTN - Water Cooling; Cooling;Heating the Shaft Seal; Heating

6 Commissioning/Start-up/Shutdown
30 of 76
CTN / CTN-H
6.1.6 Water cooling
CAUTION
Deposit-forming, aggressive cooling water
Damage to the pump!
▷ Observe the cooling water quality.
Observe the following quality data of the cooling water:
▪ Not deposit-forming
▪ Not aggressive
▪ Free from suspended solids
▪ Hardness on average 5°dH (~1mmol/l)
▪ pH > 8
▪ Conditioned and neutral with regard to mechanical corrosion
▪ Inlet temperature t
inl
=10 to 30°C
Outlet temperature t
outl
= 45°C max.
6.1.7 Cooling/heating the shaft seal
The shaft seal chamber, if any, can be cooled.
To dissipate the generated heat, a fan impeller can be fitted by KSB above the shaft
seal.
If necessary, the shaft seal chamber can also be heated.
WARNING
Rotating fan impeller
Risk of injury!
▷ Only remove the cover plate when the pump has been stopped.
DANGER
Excessive surface temperature
Explosion hazard!
Risk of burns!
▷ Observe the permissible temperature classes. (ðSection2.9.2,Page11)
Table13: Permissible pressure and temperature limits for the shaft seal chamber
Sizes Cooling liquid Inlet
temperature
Heating (saturated
vapour)
Quantity Max.
pressure
Max.
pressure
Max.
temperature
[l/min] [bar] [°C] [bar] [°C]
25/40/50 2 10 Approx. 20 7,1 165
80/100 3
125/150 4
200/250 5
6.1.8 Heating
CTN-H
Pipe assemblies If pumping fluids which can only be pumped in warm or hot condition, the pipe
assemblies must be heated.