Produkt.pm6.5 - USA
Page 2.13
Product description
BOGE Operating instructions for S 40-2...S 341 / SF 40-2...SF 220 series screw compressors
Water connection
(for water cooling)
The cooling water must have the following properties:
Electrical conductivity: >50 µS/cm at pH value 7–9:
Carbonatehardness CaCo
3
<16°dH
Cooling water pressure – max. [psig] 146
– min. [psig] 30
Cooling water inlet temperature – min. [°F] 41
– max. [°F] 86
Max. cooling water quantity – refer to technical data.
The cooling units are fitted with nonferrous heat exchangers, as standard.
To avoid damage to these components and to guarantee a long term function,
ensure that the substances contained in the cooling water used do not exceed
the following values:
Substances Symbol max. admissible concentration [mg/l]
Ammonia NH
3
2
Chloride <70°C Ci 100
Sulphite, free chlorides Ci 5
Iron Fe 2
Free carbon dioxide Co
2
20
Manganese Mn 1
Nitrate NO
3
100
Oxygen O
2
2
Silicon oxide SiO
2
8
Sulphate SO
4
60
Total dissolved substances TD-S 600
Table: Maximum admissible concentration of the substances
If the specified limit values are exceeded, use cooling units made of other
materials.
Please consult BOGE service.
ATTENTION!
If the cooling water data changes, the cooling units may have to be
redesigned. Incorrectly designed cooling units may cause malfunctions
and the compressor to switch off!
Please consult BOGE.
Cooling water quality
2.7 Cooling water
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