DDA Pump

The Grundfos DDA pump is a high-precision digital diaphragm dosing pump designed for accurate, reliable chemical dosing in water treatment and industrial process applications. Equipped with Digital Dosing™ technology, the DDA ensures constant and precise dosing over a wide operating range, independent of pressure variations. Its intelligent control system and robust construction make it ideal for applications requiring high accuracy, repeatability, and chemical resistance.

Key features

  • Digital Dosing™ technology for consistent and highly accurate dosing

  • Wide turndown ratio (up to 1:3000) without loss of accuracy

  • Automatic pressure compensation ensures constant dosing volume

  • Intuitive control interface with multilingual display

  • Multiple control modes: manual, pulse, batch, analog (4–20 mA)

  • Integrated alarms and diagnostics for safe operation

  • Chemical-resistant materials for aggressive dosing media

  • Optional fieldbus communication (PROFIBUS, Modbus, etc.)

  • Low pulsation dosing for smooth chemical injection

Typical Applications

  • Drinking water treatment

  • Wastewater treatment

  • Chemical dosing (acids, alkalis, disinfectants)

  • pH control systems

  • Cooling water and boiler water treatment

  • Industrial process dosing

Specification

SpecificationTypical Range
Pump TypeDigital diaphragm dosing pump
Max Flow RateUp to ~30 l/h
Max PressureUp to 16 bar
Turndown RatioUp to 1:3000
Dosing Accuracy±1% or better
Stroke FrequencyUp to ~300 strokes/min
Power Supply100–240 V AC, 50/60 Hz
Protection ClassIP65
Liquid Temperature0 °C to +45 °C
Wetted MaterialsPVDF, PTFE, EPDM, FKM (model-dependent)
Control SignalsPulse, analog 0/4–20 mA
Communication (Optional)Modbus, PROFIBUS, Ethernet

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EQPT offer feature unique technological solutions, with several of them being patented. Our products combine proven modern technologies and enable water quality control through the use of digitalization