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DOK-SYTROX-MPA01******-IT02-EN-P
Rexroth Sytronix SvP 70xx Motor-Pump Unit MPA01
Quality of the cooling water
pH-value (at 20 °C)
Total hardness
Concentration of chloride
Concentration of sulfate
Concentration of nitrate
Part of dissolved materials
Particle size of contamina‐
tions
Conductivity
Cleaning the coolant circuit
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01
Should other coolant mediums than water be used, a perform‐
ance reduction of the motor can be necessary to dissipate the
created power loss within the cooling medium. In this case,
please contact your Bosch Rexroth sales partner.
NOTICE
●
For this reason, liquid cooled motors may only be operated as long as
coolant supply is ensured.
●
Observe the manufacturer's instructions when designing and operating
cooling aggregates.
●
Do not use coolants or cutting materials from machining processes for
cooling.
●
If the coolants, additives or cooling lubricants used are too aggressive,
the motors may be damaged to an irreparable degree.
Requirements on the cooling water, especially with regard to the material
compatibility must be adjusted with the manufacturer of coolant aggregates
and the manufacturer of the coolant additives. Basically, the minimum re‐
quirements on the cooling water are shown in the following.
Cooling water quality for motors with internal cooling circuit made of ...
Aluminum pressure casting /
Copper/brass
1.2 ... 1.8 mmol/l
< 40 ppm
< 50 ppm
< 50 µS/cm
Tab.9-2:
Quality of the cooling water
Inspect and clean (purge) the cooling system at regular intervals as specified
in the machine and cooling system manufacturer's maintenance schedule.
Note that the utilization of unsuitable cleaning agents may cause irreversible
damage to the motor cooling system. This type of damages does not lie with‐
in the responsibility of Bosch Rexroth.
Bosch Rexroth AG
Liquid Cooling MSK133
Impairment or failure of motor, machine or
cooling system!
steel
6 ... 9
< 50 ppm
< 350 ppm
≤ 100 µm
< 500 µS/cm
63/123
Stainless steel
1.2 ... 2.5 mmol/l
< 150 ppm
< 200 ppm
< 2,000 µS/cm
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