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The ultrapure water unit is used to produce diluate with a typical conductivity < 0.2 μS/cm by treating reverse osmosis permeate via electrodeionisation (EDI). It is equipped with high quality EDI modules and a Siemens LOGO! controller.

Benefits

• Diluate with typical conductivity < 0.2 μS/cm
• Prepared for direct connection to an RO unit
• Piping in PP

Applications

• For further demineralisation of RO permeate
• For pharmaceutical or laboratory applications, power plants and microelectronics

Controller :

PLC Siemens Logo

Resistance diluate without CO2 binding:

5 MΩ x cm

Resistance diluate with CO2 binding:

10 MΩ x cm

Recovery:

90 – 95 %

Diluate backpressure max.:

1.0 bar

Ambient temperature:

5 - 40 °C

Conditions of use:

The unit is designed for a permeate conductivity of 4-20 µS/cm, a CO2 concentration of 10 mg/l and free diluate discharge. The feed water must be softened (< 0.05 °dH) and treated via a reverse osmosis unit without a permeate buffer. The diluate quality depends on the permeate quality. In addition, the following parameters must be maintained in the feed water:

Free chlorine:

not detectable

Silica (SiO2):

0.5 mg/l

Silt density index (SDI):

< 0.25

Feed water temperature:

5 – 35 °C

Feed water pressure:

2 – 4 bar

Pressure fluctuation:

± 0.5 bar

pH value feed water:

5.0 - 9.5