GB 04357 - Edition 03 - Dec 11
1/2
B 30
Alcatel Vacuum Technology France - ATH 200 User’s Manual
Connection to the cooling circuit
Water characteristics
In order to limit corrosion and clogging of the motor cooling circuit,
it is
recommended to use cooling water with the following characteristics:
Treated soft water or non-corrosive industrial water
pH level between 7.5 and 11
Hardness < 7 milli-equivalent/l
= 350 mg/l of CaO
3
calcium carbonate
= 35°f (French degree)
Resistivity : 20 000 .cm > R > 1500 .cm
Solid particle size (max.): 0.2 mm
Solid pollution < 100 mg/dm
3
Temperature 25°C max. / 10°C min
Min. supply pressure: 29 PSIG (2 bar relative)
Max. supply pressure: 87 PSIG (6 bar relative)
Min. pressure differential across supply and return: 30 PSI (2 bar)
Water flow: min. 100 l/h
If the «solid particle size» and «solid pollution» water
characteristics values can not be reached, install a filter on the
cooling connection.
•
Risk of water leak.
In case of water fitting leak or water line break, the water can reach the
power supply components.
The end user need to provide a water leak detector which shut off the
water source.
As loss of cooling water creates a significant risk, then the water flow
must be monitored externally by the process equipment.
The use of uncontrolled city water can lead to water circuit clogging
due to limestone deposition, which may necessitate in the worst case a
complete cleaning and overhaul of the cooling circuit.
The presence of micro-organisms like aquatic weed and micro-biological
substances like bacteria can lead to cooling problem in the pump.
Appropriate water treatment system need to be used to prevent such
growth of micro-organisms.
adixen Vacuum Products - A100L - Dry Pump - Operating Instructions
