UP-S7 550-20,000 FU Ultrapure Water Units (RO + EDI)

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Herco Wassertechnik GmbH

Neckar, Germany

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Utilizing the reverse osmosis process in conjunction with electrodeionization (EDI) to fully desalinate softened water, the ultrapure water unit generates diluate with a typical conductivity of less than 0.2 μS/cm. A premium centrifugal pump with variable-speed drive (VSD = FU) is included. Frequency-controlled operation prolongs the unit's life, lowers electricity costs by 30% to 50%, and maintains continuous permeate production regardless of operating pressure. 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 and Conditions:

This device can only be used to desalinate surface or well water that has been properly pretreated or softened to less than 0.1 °dH, suitable for drinking.
In addition to free diluate outflow, the unit is designed to operate at a salinity (TDS) of 1,000 mg/l, 15 °C, and 10 mg/l of CO2.
It takes three years of operation under these circumstances to reach the anticipated diluate output.
Pre-treatment and raw water quality both affect the diluate's quality.

                                                            Controller
                                                            PLC Siemens S7-1200
                                                        
                                                            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
                                                        
                                                            Free chlorine
                                                            not detectable
                                                        
                                                            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

Utilization of Ultrapure Water Units (RO + EDI)

For constant distribution of diluate at high flows
Perfect for uses where permeate conductivity requirements are extremely strict (e.g. pharmaceutical, power plant, microelectronics)
Ideal for lowering the price of electricity.

Advantages of 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
Equipment with VSD (FU) allows for a longer lifespan, a 30% to 50% reduction in electricity costs, and a particularly quiet operation while maintaining a consistent permeate production.
Included in permeate recycling PR was

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