Water quality guidelines for adiabatic
pre-cooler Frame
Baltibond
®
Hybrid Coating
Temperature < 20 ºC
PH 6.5 – 9
Hardness as (CaCO
3
) 30 – 500 mg/l
Alkaline as (CaCO
3
) < 500 mg/l
Total dissolved solids < 1500 mg/l
Chlorides < 200 mg/l
Sulfates < 300 mg/l
Conductivity 1800 µS/cm
Bacteria Rate (CFU/ml, KBE/ml) < 1000
Minimum supply water quality
For Ozone water treatment application:
• Stainless steel 316L execution is required.
• Ozone levels are to be maintained to 0.2 ppm ± 0.1 ppm for at least 90% of the time, with absolute maximum
peaks of 0.5 ppm
Recommended adiabatic pre-cooler water flow rates
If any of the following happens:
• at ambient conditions exceeding the given maximum ambient conditions,
• with supply water quality data exceeding one or more of the concentration limits of above table "Minimum
supply water quality",
• if the supply water has a Practical Scaling Index below 5.5,
Then:
• the water flow needs to be increased to higher levels to avoid rapid fouling and scaling of the pre-cooler
medium. Contact your local BAC-Balticare representative for support.
Data for rapid calculations of Practical Scaling Index for adiabatic pre-cooler
Conductivity
(µS/cm)
A
Temperature
ºC
B
Calcium hardness
(PPM as CaCO
3
)
C
Total alkalinity
(PPM as CaCO
3
)
D
Alkalinity
(PPM as CaCO
3
)
pHeq
50-300
301-1000
1001-3000
3001-5000
0.1
0.2
0.25
0.27
10-13
14-17
18-21
22-27
2.3
2.2
2.1
2.0
10-15
16-25
26-40
41-70
71-100
101-140
141-200
201-250
251-300
301-350
351-400
401-450
451-500
0.70
0.90
1.10
1.35
1.55
1.70
1.85
1.95
2.05
2.12
2.18
2.24
2.28
10-15
16-25
26-40
41-70
71-100
101-140
141-200
201-250
251-300
301-350
351-400
401-450
451-500
1.10
1.30
1.50
1.75
1.90
2.10
2.25
2.35
2.45
2.52
2.58
2.63
2.68
50
100
200
300
400
500
7.0
7.5
7.9
8.2
8.4
8.5
Calculation of Practical Scaling Index
W W W . B A L T I M O R E A I R C O I L . E U
9
3 Water care
3 Water care
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