Grundfos Grundfos SMART Digital DDA
Grundfos SMART Digital DDA diaphragm dosing pumps, from 7.5 l/h at 16 bar to 30 l/h at 4 bar.
SMART Digital DDA is a range of Grundfos diaphragm dosing pumps with a variable-speed stepper motor (Digital Dosing), intended for industrial applications that need a wide flow and pressure range, such as process water, the food and beverage industry, ultrafiltration and reverse osmosis, the pulp and paper industry, boiler feed water and CIP cleaning. The range has four sizes, with maximum flow and maximum pressure of 7.5 l/h at 16 bar, 12 l/h at 10 bar, 17 l/h at 7 bar and 30 l/h at 4 bar. The full code describes the control variant, the material of the dosing head, gasket and valve balls, the valve type, the connections and the plug type.
For a quotation we need the full code from the pump nameplate, for example DDA 7.5-16 AR-PP/V/C-F-31U2U2FG, or the eight-digit Grundfos product number. If the nameplate is missing, it helps us to know the required flow and pressure, the dosed liquid and its concentration, the temperature, the viscosity and the connection type (hose or thread). We confirm the variant in the manufacturer's documentation before sending the quotation. New pumps are usually supplied on order in 1–4 weeks; the lead time can be 24–72 h when the item is available locally or at the supplier.
Models and codes
| Code | Note |
|---|---|
| DDA 7.5-16 AR-PP/V/C-F-31U2U2FG | example code from the data booklet: polypropylene head, FKM gasket, ceramic balls, hose connection. |
| DDA 7.5-16 AR-PVC/V/C-F-31U2U2FG | PVC head (limited to 10 bar), FKM gasket, ceramic balls. |
| DDA 7.5-16 AR-PV/T/C-F-31U2U2FG | PVDF head, PTFE gasket, ceramic balls. |
| DDA 7.5-16 AR-SS/T/SS-F-31AAFG | 1.4435 stainless steel head, Rp 1/4 threaded connection. |
| DDA 7.5-16 AR-C-PV/T/C-F-31U7U7BG | DDA-C generation, PVDF head, PTFE gasket. |
| DDA 12-10 AR-C-PV/V/C-F-31U7U7BG | DDA-C generation, PVDF head, FKM gasket, ceramic balls. |
| DDA 17-7 AR-C-PV/V/C-F-31U7U7BG | DDA-C generation, size 17 l/h at 7 bar. |
| DDA 30-4 AR-C-PV/V/C-F-31U7U7BG | DDA-C generation, size 30 l/h at 4 bar. |
Key specifications
| Maximum flow (7.5-16 / 12-10 / 17-7 / 30-4) | 7.5 / 12 / 17 / 30 l/h |
|---|---|
| Maximum operating pressure (same sizes) | 16 / 10 / 7 / 4 bar |
| Turn-down ratio | 1:3000 for 7.5-16; 1:1000 for the others |
| Power supply | 100-240 V (-10 %/+10 %), 50/60 Hz |
| Liquid temperature | -10…+45 °C |
| Ambient temperature | 0…+45 °C |
| Protection class | IP65, Type 4X |
| Repeatability | ± 1 of the set value % |
The March 2026 edition of the Grundfos “SMART Digital S” data booklet describes the next generation, DDA-C, with the same four sizes (7.5-16, 12-10, 17-7, 30-4). The 2024 edition describes the DDA models without the -C suffix. Before quoting, we check by code which variant is currently available, including the DDA without -C.
Frequently asked questions
How do I identify exactly the DDA pump I am replacing?
From the full code on the nameplate (for example DDA 7.5-16 AR-PP/V/C-F-31U2U2FG) or from the eight-digit Grundfos product number. The data booklet states that the type code serves to identify the pump, not to configure it. If the nameplate is missing, send us the flow, the pressure, the dosed liquid and the connection type.
What do PV/V/C mean in the pump code?
They are the materials of the wetted parts: PV is the PVDF dosing head, V the FKM gasket and C the ceramic valve balls. Other combinations are PP (polypropylene), PVC (up to 10 bar) or SS (1.4435 stainless steel), with gasket E (EPDM) or T (PTFE). Compatibility with your liquid is checked before ordering.
What is the difference between the AR, FC and FCM variants?
According to the 2024 data booklet, AR is the standard DDA variant, FC adds FlowControl, and FCM also adds integrated flow measurement. The DDA-C generation uses the codes AR-C and FCM-C.
Other Grundfos series
We do not carry out installation or commissioning. Some combinations of dosing head, gaskets and control variant (for example PV/V/C at size 7.5-16) do not appear in the standard range; for these we confirm availability on the full code before quoting.
Updated: 2026-11-12