51 - PVD3627-August 2011
3.5.2.
Please refer to motor technical data for coolant flow rates.
Additives for water as cooling media
The water inlet temperature must not exceed
25°C
to get the full performances.
The inner pressure of the cooling liquid must not exceed
5 bars
.
The spindle servomotors are water cooled. Corrosion inhibitors must be added to the
water to avoid the corrosion. The complete cooling system must be taken into
account to choose the right additive, this includes: the different materials in the
cooling circuit, the chiller manufacturer recommendations, the quality of the water…
The right additive solution is the responsibility of the user. Some additives like
TYFOCOR or GLYSANTIN G48 correctly used have demonstrated their ability to
prevent corrosion in a closed cooling circuit
For example: Glysantin G48 recommendations are :
- Water hardness: 0 to 20°dH (0 – 3.6 mmol/l)
- Chloride content: max. 100ppm
- Sulphate content: max. 100ppm
Caution:
The water quality is very important and must comply with
supplier recommendations. The additive quantity and periodic
replacement must respect the same supplier recommendations.
Select carefully the materials of all the cooling system parts (chiller,
exchanger, hoses, adapters and fittings) because the difference
between material galvanic potential can generate corrosion.
Caution:
To avoid the corrosion of the motor cooling system (aluminum
or steel), the water must have anti-corrosion additive.
Caution: The additive choice must take into account the global cooling
system (chiller or water exchanger recommendations…).
