
TITLE
DRAW.NO.
17/
FANUC LASER C2000-MODEL E
A-81057E-002
PPR.
EDIT
DATE.
DESIG.
DESCRIPTION
DESIG.
CHECK
010207 MAEDA DRAW
CHECK
SHEET
22
5.5. Cooling Water
(1) Water specification
Cooling water with following specification should be used to avoid rust and blockage
by chalk deposition. When using ordinary tap water it is strongly recommended to
use an ion exchange unit to get deionized water.
pH
(25
°C)
6.0 to 8.0
El. conductivity
μS/cm(25
°C)
< 200
Standard Chloride Cl
-
(ppm) < 20
Sulfate ion SO
4
2-
(ppm) < 50
M-alkalinity CaCO
3
(ppm) < 50
Total hardness CaCO
3
(ppm) < 50
Iron Fe
(ppm) < 0.3
Reference Sulfur ion S
2-
(ppm) N.D.
Ammonium ion NH
4
(ppm) < 0.2
Silica Si0
2
(ppm) < 30
(2) Water additives
We recommend to use following additives to adjust the water quality in areas where the
water quality is very poor. For the cleaning of the cooling water circuit a chemical
cleaner should be used. In extremely cold areas an anti freezing agent has to be
applied.
・Corrosion inhibitor Contlime K-6000 (Mitsubishi Gas Chemical Company, Inc.)
Kurilex L-111 (Kurita Water Industries LTD.)
・Chemical cleaner Deslime (Mitsubishi Gas Chemical Company, Inc.)
Kuridine I-302 (Kurita Water Industries LTD.)
(3) The freeze proofing
In the cold district, we will recommend the frozen prevention function to make the pump
work when the temperature decreases to be applied. In addition, the water temperature
must not fall too much building the heater into the chiller in the very cold district. We will
recommend the chiller with built-in heater because it should adjust the water
temperature to 20℃ or more when the oscillator is started. Warm up function will start
automatically when the temperature in the oscillator is too low when starting.
Moreover, use the ethylene glycol by 30% or less in the density when you unavoidably
use antifreeze. Limit the use in four months of winter.
In addition, it might not cause corrosion when the different kind of anticorrosive is mixed,
and do not use antifreeze with the anticorrosive.