Digital Dosing Pump
Grundfos DMS dosing pumps are low cost diaphragm dosing pumps. The integral digital control unit allows a high turndown ratio to give great control flexibility without the vibration caused by the sharp pulsation in solenoid pumps.
The electronically controlled synchronous motor of the DMS offers almost the same advantages as those of the DME pumps. In a conventional diaphragm pump, the flow rate is adjusted by varying the stroke length. In Grundfos Digital Dosing pumps, the flow rate is adjusted by varying the stroke frequency. The operation of the pump offers several advantages:
- The pump is always operating at full stroke length, irrespective of the capacity set, for optimum accuracy, priming and suction.
- A turndown ratio of 1:100 for each pump size.
- Reduction of pressure surges, preventing mechanical stress on diaphragm, tubes, connections and other dosing parts exposed to leakage and wear.
- The installation is less affected by long suction and discharge lines.
- Easier dosing of highly viscous and gas-containing liquids.
- DMS A Version has analogue control of dosing rate.
Switching To Grundfos
Switching your existing LMI, Prominent, Alldos or Pulsafeeder dosing pump is simple and can bring several benefits. Click here for more...
Technical Specifications
| Pump Type | DMS 2 | DMS 4 | DMS 8 | DMS 12 |
| Capacity at Max Pressure (l/hr) | 2.5 | 4 | 7.5 | 12 |
| Max Pressure (bar) | 11 | 7 | 5.4 | 3.4 |
| Setting Range | 1:100 | |||
| Suction Lift (m) | 6 | |||
| Max Stroke Frequency (min-1) | 180 | |||
| Max Viscosity (mPa) | 500 | |||
| Power Supply (V) @ 50 Hz | 230 | |||
| Repeatability (%) | ±1 | |||
Application Areas
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Wet End Materials
| Component | Standard | Alternate 1 | Alternate 2 |
| Diaphragm | PTFE coated EPDM | ||
| Head | Polypropylene | PVDF | Stainless Steel 1.4401 |
| Ball Valve | Ceramic | Stainless Steel 1.4401 | Glass |
| Valve Seat | EPDM | VITON | |
| Seals | EPDM | VITON |
Any combination of the above materials is available. Other materials are available on request.
Dimensions
| A (mm) | 137 |
| B (mm) | 239 |
| C (mm) | 36 |
| D (mm) | 168 |
