Installation
32 300324726_002_C0 - 10/2016 - © Leybold
If immediate pump shut-down in case of cooling water supply failure is
re quired, then a flow monitor will have to be inserted in the drain line. If you
do not close the cooling water it may take longer to achieve ultimate pres-
sure after start up of the system.
When decommissioning the pump, drain out the cooling water and blow out
the cooling water lines so as to avoid frost damage.
Do not open or modify the cooling water connections at the rear of the
pump.
Cooling water specifications
Inlet temperature 10 - 35 °C
Inlet pressure max. 6 bar
Cooling water requirement > 60 l/h
3.5.1 Water Quality
In order to ensure long trouble-free operation the cooling water must not
contain any oils, greases and suspended solids. Moreover, we recommend
compliance with the following limit values:
Appearance Clear, free of oils and greases
Suspended matter < 250 mg/l
Particle size < 150 µm
Electrical conductivity < 700 µS/cm
pH value 7.0 to 9,0
Total hardness (total alkaline earths) < 8 °dH
Aggressive carbon dioxide None, not detectable
Chloride < 100 mg/l
Sulfate < 150 mg/l
Nitrate ≤ 50 mg/l
Iron < 0.2 mg/l
350
300
250
200
150
100
50
0
l/h
10 20 25 30
15
°C
35 40
Flow
Temperature
Fig. 3.8 Recommended cooling water flow
When using the optional cooling water valve kit the maximum flow is reduced
to 150 l/h.
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