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Dosing Units DOS DDE for Basic Applications
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Herco Wassertechnik GmbH
Neckar, Germany
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Complete pre-assembled system for the storage and dosing of liquid active substances in water-bearing systems, including dosing pump, dosing tank, dosing hose, suction lance, and control cable. The diaphragm dosing pump DDE for basic applications with a speed-controlled stepper motor drive and intelligent control electronics is used for automatically, constantly, or intermittently dosing non-outgassing substances. For maximum precision while dosing, the dosing pump always operates at full stroke length. The stepper motor drive enables low-pulsation and sustained dosing even at low dose volume flows.

Suction lift max. 6.0 mWS
Protection class IP 65
Conditions of use Can be used for dosing liquid, non-gassing active substances. Resistance of the materials to the chemicals used must be checked.
Temperature Dosing medium 0 – 40 °C
Ambient temperature 0 – 40 °C

Utilization of Dosing Units

  1. Economical dosing station with manual operation and other essential features
  2. Ideal for a variety of general applications, such as biocide dosing or water-meter controlled dosing

Advantages of Dosing Units
  1. Impact-resistant, stable tank with side-mounted level markers
  2. Excellent dosage accuracy since the pump constantly runs at full stroke length
  3. Due to a continuous suction stroke and a varied pressure stroke, the dosage is uniform and consistent.
  4. longer service life as a result of fewer pressure peaks
  5. Includes extras including a cable, dosing hose, and suction lance.





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