➤ Consult KAESER Service if you wish to use a different heat-receiving medium.
Water quality specification
Characteristics/content Value
pH value 7.5–9
Total hardness [°dH] 4.0–8.5
Chloride (Cl) [mg/l] <150
Free chlorine gas (Cl
2
) [mg/l] <1
Sulphite (SO
3
) [mg/l] <1
Dissolved iron (Fe) [mg/l] <0.2
Hydrogen carbonat (HCO
3
) [mg/l] 70–300
Sulphate (SO
4
) [mg/l] <70
HCO
3
/SO
4
>1
Electrical conductivity [µS/cm] 10–500
Ammonia (NH
3
) [mg/l] <2
Dissolved manganese (Mn) [mg/l] <0.1
Dissolved aluminium (Al) [mg/l] <0.2
Dissolved nitrate (NO
3
) [mg/l] <100
Hydrogen sulphide (H
2
S) [mg/l] <0,05
Free aggressive carbon dioxide (CO
2
) [mg/l] <5
Glycol [%] <50
Solids (particle size) [mm] <0.1
Algae Not permitted
Tab. 29 Water quality specification
Heat exchanger specification
BSD 40 BSD 50 BSD 60
Material 1.4401 1.4401 1.4401
Braze Copper (Cu) Copper (Cu) Copper (Cu)
Maximum working pres‐
sure [psig]
(heat transfer medium)
145 145 145
Maximum permissible out‐
let temperature [°F]
212 212 212
Unsuitable heat transfer
media
Seawater
Consult KAESER about water types.
Tab. 30 Heat exchanger specification (option W2/W3)
2 Technical Data
2.16 Heat recovery
14
Service Manual Screw Compressor
BSD 9_5708 08 USE