Montage- und Betriebsanleitung
18.0 Richtlinien für die Wasserqualität in gelöteten Danfoss-Wärmetauschern
Parameter
pH
Conductivity
Free Chlorine
Ammonia (NH
, NH
+
3
4
Alkalinity (HCO
-
)
3
Sulphate (SO
2-
)
4
HCO
-
/ SO
2-
3
4
Nitrate (NO
)
3
Manganese (Mn)
Iron (Fe)
* Hardness ratio
[Ca
2+
, Mg
2+
]/[HCO
-
]
3
+
Good corrosion resistance
o
**Corrosion could happen when more parameters are evaluated with o
o/-
Risk of corrosion
-
Use is not recommended
* Hardness ration limits defined per experience and internal tests in Danfoss laboratory
** In case of three or more parameters evaluated with o consultancy is needed with Consultant for Corrosion & Microbiology or BU HHE Representative
Recommended Chloride concentration to avoid Stress Corrosion Cracking (SCC) in the stainless-steel plates:
Application temperature
at T ≤ 20°C
at T ≤ 50°C
at T ≤ 80°C
at T ≥ 100°C
For weitere Informationen, bitte folgen Sie diesem
24
DKDHR
Unit
Value or concentration
6,0 – 7.5
7.5 – 10.5
10 – 500
µS/cm
500 – 1000
mg/l
)
mg/l
mg/l
60 – 300
mg/l
100 – 300
mg/l
mg/l
mg/l
mg/l
/
0.3 – 0.5
Chloride concentration
max 1000 mg/l
max 400 mg/l
max 200 mg/l
max 100 mg/l
145X2026 / AQ16358647111801-000101
Durch usswassererwärmer
Plate
AISI 316L
W.Nr. 1.4404
< 6.0
o
+
+
>10.5
+
<10
+
+
+
>1000
+
<0.5
+
0.5 – 1
o
1 – 5
-
>5
-
<2
+
2 – 20
+
>20
+
<60
+
+
>300
+
<100
+
+
>300
+
>1.5
+
<1.5
+
<100
+
>100
+
<0.1
+
>0.1
+
<0.2
+
>0.2
+
0 – 0.3
+
+
>0.5
+
link
Brazing material
Cu
CuNi
-
-
o/-
o
+
+
o
o
+
+
+
+
o
+
-
o
+
+
+
+
o
o
-
-
+
+
o
o
-
-
+
+
+
+
o
+
+
+
o/-
o
-
-
+
+
o/-
o
+
+
o
+
+
+
o
o
+
+
o
+
-
-
o/-
+
+
+
Danfoss District Energy
StS
o
+
+
+
+
+
+
+
+
+
o
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+