GRUNDFOS DDE/DDC/DDA–CHEMICAL DOSING PUMPS

Grundfos Digital Dosing chemical dosing pumps are high-specification products designed for dosing a wide range of chemicals
in general water treatment and industrial process applications. All feature precise mechanical diaphragm operation fully at
maximum output, the resulting smooth action provides assured dosage accuracy and quiet operation.
All pumps feature corrosion-resistant PVC for the pump bodies and dosing heads, EPDM diaphragms, and ceramic valve balls.
Other materials for special applications are available on request. They are also supplied with complete installation kits including foot valve with strainer, injector valve, 2m PVC suction hose, and 6m PE delivery hose.
DD Range
The Digital Dosing range are state-of-the-art digital dosage pumps that incorporate a number of technology-leading features.
At the heart of all pumps is a powerful variable speed motor that gives highly accurate dosage at constant stroke length, dosage rate varying with stroke speed. The pumps also feature intelligent microprocessor control that provides many benefits in
terms of control, dosage accuracy, protection, and reliability. Other features include adjustment from 0.1 – 100% of the rated
flow. Models are available as follows:-
DDE
A basic pump with all the essential operating features but for manual control. Connections are also available for external concentrate tank level control. Pulse input enabled model available on request.
DDC
Similar to DDE but with advanced control features added including a digital display control module that incorporated a number
of operating features as well as the facility for variable dosage rates controlled by an analogue signal from an external probe
that senses the closed water condition.
DDA
The advanced solution with the click wheel and the multi-colored backlit graphical LC display make commissioning and operation intuitive. Advanced features included option of manual, pulse, analog batch, timer or fieldbus control. Other features include
Auto dearation to avoid airlock during idle times. Degassing for high viscous liquids, service information display, and lock code to
avoid unauthorized access. The pump also has optional inputs including pulse, analog 4-20mA, low-level and tank empty inputs,
potential free out relays– can be configured for alarm, time, etc. All pumps are supplied with an installaƟon kit.