Data
Value Unit
Sulfate [SO
4
2-
]
< 70 mg/L
Ratio hydrogen carbonate [HCO
3
-
] / sul-
fate [SO
4
2-
]
> 1 ---
Total water hardness
4.0
-
8.5 °dH
Electrical conductivity
30
-
500 μS/cm
Sulfite (SO
3
2-
)
< 1 mg/L
Free chlorine gas (Cl
2
)
< 0.5 mg/L
Nitrate (NO
3
-
)
< 100 mg/L
Ammonia (NH
3
)
Not permitted ---
Iron (Fe), dissolved
< 0.2 mg/L
Manganese (Mn), dissolved
< 0.05 mg/L
Aluminum (Al), dissolved
< 0.2 mg/L
Free aggressive carbon dioxide (CO
2
)
Not permitted ---
Hydrogen sulfide (H
2
S)
Not permitted ---
Algae growth
Not permitted ---
Suspended matter
Not permitted ---
4.6 Connecting the cooling water
This section is relevant for:
n
Water-cooled devices
All water-cooled devices are equipped with the following cooling water con-
nection:
n
Exterior thread (male) G ¾ inch
Table 4: Cooling water data
Specification
Value
Maximum cooling water
pressure
10 bar
Cooling water temperature
15°C recommended; 10 to 30°C permitted
(in upper temperature range with reduced
cooling output)
Cooling water pressure dif-
ference
3 bar recommended, further information
V4
Integral process thermostats with flow control unit
35 / 171
