HAF Activated Carbon Filter

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Herco Wassertechnik GmbH

Neckar, Germany

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Filtered raw water is treated to eliminate organic contaminants and free chlorine using the HAF activated carbon filter equipped with a Clack main control valve. This automatic single filter unit uses raw water for time-controlled backwashing. Using a floating contact, downstream systems can be turned off while backwashing is occurring.There is an optional skid variant with city water backwash.
Terms of usage:

Depending on how much absorbable material the raw water contains, the activated carbon filter medium's absorption capacity is depleted when it passes through it.
Not even backwashing can bring it back to life.
As a result, frequent replacement of the activated carbon is required.
There is less unfiltered water available for backwashing.
When the central control valve is turned off, sizes 1C through 4C are briefly without water.
A BP bypass valve must be installed if water is to be supplied constantly.
A service valve (BV) must be installed if only filtered water is to be delivered.
In order to guarantee adequate backwashing, it is also required to unpressurize the filtrate line.
The installation of an aeration and deaeration valve BEV is required if negative pressure can arise in the filter (for example, during operation prior to a pressure increase or RO).

                                                            Operating pressure
                                                            1.5 – 8.0 bar
                                                        
                                                            Controller
                                                            Clack
                                                        
                                                            Pressure fluctuation
                                                            ± 0.5 bar
                                                        
                                                            Filter medium
                                                            activated carbon 0.5 - 2.5 mm
                                                        
                                                            Support medium
                                                            quartz gravel 1 - 2 mm
                                                        
                                                            Filter velocity
                                                            20 m/h
                                                        
                                                            Backwash velocity
                                                            35 m/h
                                                        
                                                            Backwash time
                                                            10 min
                                                        
                                                            Operating temperature
                                                            5 – 35 °C

Utilization of HAF Activated Carbon Filter

Elimination of free chlorine to safeguard the ensuing reverse osmosis process
Elimination of organic pollutants.

Advantages of HAF Activated Carbon Filter

Robust, user-friendly controller with dependable, fully automated operation
Easy and rapid upkeep

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