UP-S7 150 - 250 Ultrapure Water Units (RO + EDI)

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Herco Wassertechnik GmbH

Neckar, Germany

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Using electrodeionization (EDI) and complete desalination of softened water based on the reverse osmosis concept, the ultrapure water unit generates diluate with a typical conductivity < 0.2 μS/cm. It has a small rotary vane pump installed. The Siemens S7-1200 PLC allows for optimal control and assessment of the unit's functioning in addition to allowing for visualisation of the unit. Optionally available features include remote access, interface-based data transfer, and future control system expansion or modification (upon request and at an additional cost).
Terms of usage:

Only softened feed water (<0.1 °dH) with drinking water quality or suitably pre-treated well or surface water may be desalinated using this machine.
The unit is intended to operate at 1,000 mg/l of salinity (TDS), 15 °C of temperature, 10 mg/l of CO2, and free diluate outflow.
Even after three years of operation, the anticipated diluate output is reached under these circumstances.
Both the pre-treatment and the raw water quality affect the diluate's quality.

                                                            Free chlorine
                                                            not detectable
                                                        
                                                            Controller
                                                            PLC Siemens S7-1200
                                                        
                                                            Iron (Fe)
                                                            0.2 mg/l
                                                        
                                                            Manganese (Mn)
                                                            0.05 mg/l
                                                        
                                                            Silica (SiO2)
                                                            10 mg/l
                                                        
                                                            Silt density index (SDI)
                                                            < 3
                                                        
                                                            Feed water temperature
                                                            5 – 35 °C
                                                        
                                                            Feed water pressure
                                                            2 – 6 bar
                                                        
                                                            Pressure fluctuation
                                                            ± 0.5 bar
                                                        
                                                            pH value feed water
                                                            5.0 - 9.5
                                                        
                                                            RO desalination rate
                                                            97 %
                                                        
                                                            Resistance diluate without CO2 binding
                                                            5 MΩ x cm
                                                        
                                                            Resistance diluate with CO2 binding
                                                            10 MΩ x cm
                                                        
                                                            Recovery
                                                            70 – 75 %
                                                        
                                                            Diluate backpressure max.
                                                            0.5 bar
                                                        
                                                            pH value operation
                                                            3.6 – 9.5
                                                        
                                                            pH value cleaning
                                                            2.0 - 12.0
                                                        
                                                            Ambient temperature
                                                            5 - 40 °C

Utilization of UP-S7 150 - 250 Ultrapure Water Units (RO + EDI)

For a tiny footprint and continuous distribution of diluate
Perfect for uses where permeate conductivity requirements are extremely strict (e.g. pharmaceutical, power plant, microelectronics).

Advantages of UP-S7 150 - 250 Ultrapure Water Units (RO + EDI)

The combination of EDI with RO results in very good permeate quality (typ. conductivity < 0.2 μS/cm).
No chemicals needed, uninterrupted operation throughout
Easy-to-use and practical PLC S7-1200
incredibly small system
PR for permeate recycling was provided.

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