Grundfos DDI Digital Dosing

Grundfos DDI pumps provide Digital Dosing from 75 ml/h up to 150 l/h with real setting of the flow rate. The DDI ensures precise and continuous dosing which grantees consistent media mixing and process quality.  All the operator needs to do is enter the dosing rate in l/h, and the pump does the rest.

Grundfos DDI digital dosingGrundfos DDI Digital Dosing

The stepper motor/EC drives optimises control of stroke speed and increases dosing accuracy. The flow setting controls the duration of each pressure stroke. The suction stroke , which remains constant, can be adapted to relevant needs via the anti-cavitation function.  This way suction always takes place with the full stroke volume. This results in continuous dosing and lower pulsation in the dosing system.

Cost Effective

The Grundfos DDI keeps energy costs at a record low, thanks to the advanced EC motor technology. Maximum efficiency is also ensured even by flows of 150 l/h. With a high accuracy of +/- 1.5 % repeatability throughout the adjustable range, DDI pumps reduce the consumption of chemicals by precisely dosing the required amount.

Grundfos DDI digital DosingBenefits and flexibility

Straightforward input and monitoring of the dosing rate in l/h with perfect calibration, delivers a unique level of ease of use and precision. The Grundfos DDI is unusually quiet and smaller when compared to other dosing pumps within the capacity range.

Handling of high viscosity media – up to 2600 mPa s

The Digital Dosing technology allows to control the speed of the suction stroke, so as to avoid cavitation when handling highly viscous media. Two suction speeds are available.

Optional flow monitor detects dosing malfunctions on both the suction and pressure sides and issues an immediate error message


Dosing of biocides and chemicals, belt lubricant for conveyor equipment diverse range of acids, lyes, flocculation and coagulation agents, cationic and anionic polymers with very different viscosities, precipitating agents and disinfectants, CIP applications

[one_half]Areas of application

  • Paper production
  • Food and beverages industry
  • Industrial process water and sewage treatment
  • Drinking water treatment[/one_half]


  • High precision and ease of use
  • Flexibility Adaptability
  • Able to handle highly viscous media
  • High turndown ratio and functionalities allow large range of applications
  • Flow Control
  • Double PTFE diaphragm
  • Diaphragm leak detection[/one_half_last]

Available with Profibus interface to supply performance data and status information for quality control, preventive maintenance and future reference.

 We are happy to discuss your requirements with you- for expert advice call or email us.

Tel: +44 (0) 1769 575990

Fax: +44 (0) 1769 574117

Mobile: +44 (0) 7792 664930