Total
dissolved
solids
(mg/l)
A
Temperature
(°C)
B
Ca hardness
(ppm CaCO
3
)
C
M-
Alkalinity
(ppm
CaCO
3
)
D
28 - 32
1.7
36 - 44
1.2
36 - 44
1.6
33 - 38
1.6
45 - 56
1.3
45 - 56
1.7
39 - 43
1.5
57 - 70
1.4
57 - 70
1.8
44 - 49
1.4
71 - 89
1.5
71 - 89
1.9
50 - 55
1.3
90 - 112
1.6
90 - 112
2.0
56 - 61
1.2
113 - 141
1.7
113 - 141
2.1
62 - 67
1.1
142 - 177
1.8
142 - 177
2.2
68 - 73
1.0
178 - 223
1.9
178 - 223
2.3
74 - 79
0.9
224 - 281
2.0
224 - 281
2.4
80 - 85
0.8
282 - 355
2.1
282 - 355
2.5
86 - 91
0.7
356 - 446
2.2
356 - 446
2.6
92 - 95
0.6
447 - 563
2.3
447 - 563
2.7
564 - 707
2.4
564 - 707
2.8
708 - 892
2.5
708 - 892
2.9
893 - 1000
2.6
893 - 1000 3.0
Interpretation of the values obtained:
• RSI < 6: boiler scale formation
• 6 < RSI < 7: neutral water
• RSI > 7: corrosive water
As a general rule, the RSI index should be between 5.6 and 7.5. If that is not the case,
contact a specialist.
5.
Free chlorine (Cl
2
)
Disinfecting with chlorine is
not done in closed systems, neither in energy recovery systems
.
A continuous level of 0.5 ppm should not be exceeded. For shock treatments, a maximum limit of 2
ppm for maximum 30 minutes/day applies.
6.
Chlorides (Cl
-
)
Chloride ions will create pitting corrosion on stainless steel. Their concentration should be limited,
depending from the RSI value.
RSI < 5.5
5.6 < RSI < 6.2
6.3 < RSI < 6.8
6.9 < RSI < 7.5
7.6 < RSI
Cl
-
(ppm)
200
350
500
350
200
For energy recovery systems, the limit is 100 ppm.
7.
Sulphates (SO
4
2-
)
Instruction book
128
2920 7180 30
Summary of Contents for GA 30+
Page 1: ...Atlas Copco Oil injected rotary screw compressors GA 30 GA 37 GA 45 Instruction book ...
Page 2: ......
Page 15: ...Motor side view GA 30 up to GA 45 Pack Instruction book 2920 7180 30 13 ...
Page 16: ...Service side view GA 30 up to GA 45 Pack Instruction book 14 2920 7180 30 ...
Page 17: ...Motor side view GA 30 up to GA 45 Full Feature Instruction book 2920 7180 30 15 ...
Page 188: ......
Page 189: ......
