Gardner Denver L Series Service Manual page 31

7.3.1 Limit values of the constituent
elements in water
Constituent elements of
water / characteristic
values
pH value
(at 77°F)
Carbonate CaCO
hardness
Total hardness
Chloride Cl
Sulphate SO
Nitrate NO
Organic substances
(KMnO absorption)
4
free aggressive
CO
carbonic acid
Silicium oxide SiO
free chloride Cl
Oxygen O
Ammonium NH
Iron Fe
Manganese Mn
S
Sulphide
Ammoniac NH
Conductivity
Pass-
Circulating
through
water
water
6 – 9 6 – 9
< 100 mg/l < 50 mg/l
3
(5.6 °dH) (2.8 °dH)
< 2 mmol/l < 0.5 mmol/l
< 200 ppm < 50 ppm
< 11.5 °dH < 2.8 °dH
< 20 °fH < 5 °fH
-
< 200 mg/l < 50 mg/l
2-
< 200 mg/l < 50 mg/l
4
−
< 100 mg/l < 100 mg/l
3
< 25 mg/l < 10 mg/l
< 20 mg/l < 20 mg/l
2
< 10 mg/l < 10 mg/l
2
< 4 mg/l < 2 mg/l
2
< 2 mg/l < 2 mg/l
2
+
< 1mg/l < 1mg/l
4
< 0.2 mg/l < 0.2 mg/l
<0.1 mg/l <0.1 mg/l
2-
0 0
0 0
3
> 50. < 800 > 50. < 200
µS/cm µS/cm
13-25-638 v03 Page 31