6 Commissioning/Start-up/Shutdown
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HPK
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
E
= 10 to 30 °C
8)
Outlet temperature t
A
= maximum 45 °C
8)
The cooling liquid quantities indicated are based on Δt = 15 °C (max.).
In the case of deviations, the cooling liquid requirement changes in direct proportion
to the change in the temperature difference.
Q
cooling water
for Δtx = Q
cooling water
x (15 : Δtx)
6.3.6 Cooling of the shaft seal ("K" design)
CAUTION
Vaporisation pressure of fluid handled higher than atmospheric pressure
Damage to the shaft seal/pump!
▷
Cool the shaft seal.
▷
Provide sufficient quantities of cooling liquid (see table).
NOTE
The vaporisation pressure varies depending on the fluid handled, the system
pressure and the material of the shaft seal (e.g. hot water).
Observe the following data for the cooling liquid:
▪
Max. permissible cooling liquid pressure: 10 bar
▪
Cooling liquid quantities: (see table below)
Table 17:
Cooling liquid quantity depending on the bearing bracket
Bearing bracket
Temperature of the fluid handled
up to 250
℃
up to 400
℃
P08s
8
10
P10as
8
10
P12s
8
10
6.3.7 Bearing bracket cooling
When installing the cooled bearing bracket, make sure the following values are met:
▪
Cooling liquid quantity: approx. 3.3 l/min
▪
Cooling liquid pressure: 10 bar
6.3.8 Cooling of the heat exchanger
In "BR" operating mode the heat exchanger must be cooled.
8)
Higher temperatures may be permitted for systems using treated cooling water
