Chlorine Dioxide Bello Zon® CDKc

“Chlorine-Free” Chlorine Dioxide (ClO2) Generation

With its Bello Zon® CDKc ProMinent is setting new safety standards in the production of chlorine dioxide using the chlorite-acid method. In the new process version the safety standard of dilute precursor chemicals is combined with the economy of concentrated chemicals, in that concentrated hydrochloric acid is pre-diluted in an intrinsically safe dilution station. Consequently the risk of inadvertently mixing concentrated chemicals within the system is excluded.

Thanks to the integrated dilution, the chemical consumption can be matched both to various acid concentrations and the local individual operating parameters and consequently be significantly reduced in comparison with existing systems, thus increasing economy.

Instead of the PVC hitherto used in the industry, PVDF is used for the chlorine dioxide reactor. This results in higher operating safety and improved purity of the generated chlorine dioxide.

The central system controller manages the precise production of the chlorine dioxide. Chlorine dioxide, chlorite, pH or redox potential sensors DULCOTEST® can be directly connected via the two mA inputs. This makes possible the online monitoring and documentation of the water parameters associated with the chlorine dioxide treatment. Using the integrated PID controller, the chlorine dioxide concentrations in the water can be adjusted automatically depending on the measurement. All status messages and measured values are documented in the integral data logger and visualized in the easy-to-understand color display via the screen recorder.


  • Safe ClO2 generation between 150 and 12,000 g/h conforming to German Gas and Water Association (DVGW) worksheets W 224 and W 624

  • Minimized chemical consumption thanks to adjustable pre-dilution

  • Maximum operating safety and purity of the ClO2 generated using PVDF reactors

  • Optimum quality management, thanks to integrated storage of the relevant operating parameters and measured values

  • Automatic monitoring of operating parameters and maintenance intervals

  • Control with large color display, integrated data logger and screen recorder Measurement, documentation and visualization of ClO2, chlorite, pH or redox potential


  • Capacity range: 8-12,000 g/h of ClO2 (DVGW guidelines W 224 and W 624)
  • PVDF reactor
  • Stroke length monitoring for metering pumps
  • Control with large colour display, integrated data logger and screen recorder
  • Measurement, documentation, and visualisation of ClO2 and chlorite or redox potential


  • Disinfection
  • Odor removal
  • Municipal drinking water
  • Legionella control
  • Industrial wastewater treatment
  • Metal oxidation
  • Bottle Washing
  • CIP Systems
  • Cooling Towers
  • Vegetable and Fruit Washing


Type Capacity Max. operating pressure Operating temperature
g/h psi (ºF)
Bello Zon CDLb
CDKc 150 8-150 116 50-104
CDKc 400 20-400 116 50-104
CDKc 900 45-900 116 50-104
CDKc 2,000 100-2,000 73 50-104
CDKc 2,800 140-2,800 73 59-104
CDKc 7,300 365-7,300 44 59-104
CDKc 12,00 600-12,00 25 64-104


Power supply: 100-230 V, 50/60 Hz
Inputs: 2 freely configurable analog inputs 0/4-20 mA
5 digital inputs for the functions pause, high dosage, leakage,
Sample water monitoring, external collective malfunction
1 digital input for contact water meter 0.25-20 Hz
1 frequency input for water meter 10-10,000 Hz
Outputs: 1 freely configurable analog output 0/4-20 mA
1 operating signal relay
1 warning signal relay
1 voltage output +5 V as supply voltage for a water meter with Hall sensor
Operating fluids:  Sodium chlorite 24.5 %, purity according to EN 938
Hydrochloric acid 25-38 % purity according to EN 939
Potable water




Cut Sheet: Bello Zon Series | Part #: 7750236 | Updated: 10/2/18

Manuals And Instructions

Assembly And Installation Instructions: BelloZon CDKc With Pre-dilution Module | Part #: 985389 | Updated: 4/1/14
Manual: Bello Zon CDV CDKa Installation Instruction English | Part #: 987533 | Updated: 9/6/14
Manual: Bello Zon Operating Instructions CDKa | Part #: 987848 | Updated: 8/6/14
Manual: BelloZon CDKc | Part #: 986041 | Updated: 2/12/14
Operating Instructions: BelloZon CDKc With Pre-dilution Module | Part #: 985393 | Updated: 4/1/14
Safety Manual: Safety Information Bello Zon English | Part #: 987569 | Updated: 7/6/14