Total dissolved
solids (mg/l)
A
Temperature
(˚C)
B
Ca-hardness (ppm
CaCO
3
)
C
M-alkalinity (mval/l) D
28 - 31
1.9
44 - 55
1.3
0.90 - 1.10
1.7
32 - 37
1.8
56 - 69
1.4
1.12 - 1.38
1.8
38 - 44
1.7
70 - 87
1.5
1.40 - 1.76
1.9
45 - 50
1.6
88 - 110
1.6
1.78 - 2.20
2.0
51 - 56
1.5
111 - 138
1.7
2.22 - 2.78
2.1
57 - 63
1.4
138 - 174
1.8
2.80 - 3.54
2.2
64 - 71
1.3
175 - 220
1.9
3.54 - 4.40
2.3
72 - 80
1.2
230 - 270
2.0
4.6 - 5.4
2.4
280 - 340
2.1
5.6 - 7.0
2.5
350 - 430
2.2
7.2 - 8.8
2.6
440 - 550
2.3
9.0 - 11.0
2.7
560 - 690
2.4
11.2 - 13.8
2.8
700 - 870
2.5
14.0 - 17.6
2.9
880 - 1000
2.6
17.8 - 20.0
3.0
Interpretation of the value obtained
RSI
Water condition
Action
RSI<3.9
Very high scale formation
Water cannot be used.
4.0<RSI<5.5
High boiler scale formation
Regular inspection and descaling operation
necessary.
5.6<RSI<6.2
Slight boiler scale formation
Water treatment not necessary.
Occasional inspection recommended.
6.3<RSI<6.8
Neutral water
Water treatment not necessary.
Occasional inspection recommended.
6.9<RSI<7.5
Slight corrosion at higher
temperature
Water treatment not necessary.
Occasional inspection recommended.
7.6<RSI<9.0
Strong corrosion
Regular inspection necessary, use of corrosion
inhibitor recommended.
9.1<RSI<11
Very strong corrosion
Regular inspection necessary, use of corrosion
inhibitor required.
RSI>11
Very strong corrosion in
complete water system
Water should not be used.
The table indicates that distilled or demineralised water should never be used, as their RSI is > 11.
The RSI only indicates the equilibrium of scaling - descaling. A cooling water showing good RSI conditions
can still be unsuitable due to other factors.
From the table above, the RSI index should be between 5.6 and 7.5; otherwise, contact a specialist.
pH
The effect of pH is already calculated in the Ryznar index, but the pH itself has some additional limitations :
6.8 < pH
Instruction book
72
2920 1475 06
Summary of Contents for GA110
Page 1: ...GA 90 GA 110 GA 132 GA 160 GA 200 GA 250 GA 315 ...
Page 2: ......
Page 17: ...Flow diagram of GA200 GA250 and GA315 60 Hz Instruction book 2920 1475 06 15 ...
Page 30: ...Menu flow for GA 90 up to GA 315 simplified example Instruction book 28 2920 1475 06 ...
Page 57: ...Dimension drawing of GA90 110 water cooled Instruction book 2920 1475 06 55 ...
Page 60: ...Dimension drawing of GA200 250 and GA315 60 Hz air cooled Instruction book 58 2920 1475 06 ...
Page 64: ...Compressor room example of GA 90 up to GA 160 water cooled Instruction book 62 2920 1475 06 ...
Page 76: ...Suspended solids Non soluble particles size 1 mm 10 ppm Instruction book 74 2920 1475 06 ...
Page 98: ...Filler and drain plugs on GA 200 up to GA 500 compressors Instruction book 96 2920 1475 06 ...
Page 102: ...Position of oil filter on GA 200 up to GA 500 Instruction book 100 2920 1475 06 ...
Page 133: ...Instruction book 2920 1475 06 131 ...
Page 134: ......
Page 135: ......
