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Copper brazed plate heat exchangers are suitable for the following media:
- Oils, glycol, alcohol, air, water, refrigerant and many more according to the material resistance
- Group 2 fluids to the Pressure Equipment Directive 97/23/EC
Copper brazed plate heat exchangers are not suitable for the following media:
- Silicone oils, deionized water, seawater, strong chloride media, NH3, and strong acids and bases
- Explosive, strong, flammable,
highly toxic liquid media from the Group 1 of the
Pressure Equipment Directive 97/23/EC
Ingredients allowed for water.
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Substances: |
copper brazed |
nickel brazed |
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PH-value: |
7 - 9 |
6 - 10 |
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Chloride: |
< 900 mg/kg bei 25°C
< 300 mg/kg bei 50°C
< 100 mg/kg bei 80°C
< 0 mg/kg bei 100°C |
< 900 mg/kg at 25°C
< 300 mg/kg at 50°C
< 100 mg/kg at 80°C
< 0 mg/kg at 100°C |
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Sulfate: |
< 90 mg/kg |
< 250 mg/kg |
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Nitrates: |
< 100 mg/kg |
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Iron: |
< 0,2 mg/kg |
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Free carbonic: |
< 20 mg/kg |
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Manganese: |
< 0,1 mg/kg |
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Ammonia: |
< 2 mg/kg |
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Chlorine: |
< 0,5 mg/kg |
< 0,5 mg/kg |
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Electrical
conductivity: |
10 - 500 µS/cm |
|
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Oxygen: |
< 0,02 mg/kg |
< 0,02 mg/kg |
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Total water hardness: |
5 - 15 °dH |
5 - 15 °dH |
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Hydrogene sulphid: |
< 0,05 mg/kg |
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Bicarbonate: |
< 300 mg/kg |
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Sulfide: |
<1 mg/kg |
<5 mg/kg |
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Nitrite: |
0,1 mg/kg |
0,1 mg/kg |
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Particle: |
< 20 mg/kg |
< 20 mg/kg |
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Copper: |
< 0,05 mg/kg |
< 0,05 mg/kg |
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A high calcium content leads in time deposits and can clog the heat exchanger.
Copper-brazed plate heat exchangers may not be used with galvanized pipes.
For applications with deionized water, ammonia, and silicon oils are
nickel brazed plate heat exchangers
recommended. For chlorine-loaded applications, such as swimming pools is
the material AISI 316L with
higher
corrosion resistance and nickel as solder recommended. |
