Hygienic operation

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The ready-to-connect combi unit includes a pre-filter, a backflow preventer, a duplex water softener, a limitron hardness control device and a counterpressure reverse osmosis unit. It is used for the desalination of water with a salinity of up to 1,000 mg/l . It is designed for a permeate counterpressure of 4 bars and can be operated with up to 7 bars. The unit is equipped with a compact rotary vane pump (unit size 50 and 150) or a high-quality centrifugal pump (unit size 300 - 1,200) as well as a full-flow diaphragm pressure vessel. The microprocessor controller RO digital enables fully automatic operation with logging of all relevant operating data and freely adjustable limit values.

Benefits

• Ready-to-connect unit including pre-treatment
• Simple installation on site with only four connection points (drinking water, permeate, waste water, socket)
• Design with minimal dead zones and hygienic operation to meet the requirements of air conditioning applications
• Transport of permeate over several floors possible, no permeate storage required
• Versatile RO digital controller with logging of operation data and many parametrisation options

Applications

• Continuous water softening and desalination
• For the direct supply of e.g. air-conditioning systems such as humidifiers with water according to VDI 6022

Controller :

RO digital

Desalination rate min.:

97 %

Permeate recovery:

75 – 80 %

Permeate back pressure max.:

4 - 7 bar

pH value operation:

6.5 – 9.5

pH value cleaning:

2 – 12

Ambient temperature:

5 – 40 °C

Conditions of use:

The unit may only be used for the desalination of feed water with drinking water quality or appropriately pre-treated well or surface water. The unit is designed for a salinity (TDS) of 1,000 mg/l and a temperature of 15 °C. Under these conditions, the projected permeate output is achieved even after three years of operation. The permeate yield depends on the raw water quality and the pre-treatment. The following parameters must be maintained in the feed water:

Free chlorine:

not detectable

Iron (Fe):

< 0.2 mg/l

Manganese (Mn):

< 0.05 mg/l

Silica (SiO2):

< 25 mg/l

Silt density index (SDI):

< 3

Feed water temperature:

5 – 35 °C

Feed water pressure:

4 – 6 bar

Pressure fluctuation:

± 0.5 bar