| Digital Dosing™ is made possible by a completely new drive principle in a diaphragm dosing pump. This is supplemented with direct electronic digital control from a pushbutton control panel which takes all the guesswork out of dosing. Digital Dosing™ means that when you set your pump to supply a specific dosage you will know that what you set is what you get. What Grundfos is bringing you here is not an improvement on existing pumps. It is an innovation in the very true sense of the word – a completely new standard. It will make your job a lot easier and your results a lot better. You will save time, and you will save money.
SWITCHING TO GRUNDFOS
Switching your existing LMI, Prominent, Alldos or Pulsafeeder dosing pump is simple and can bring several benefits. Click here for more…
CUTTING EDGE TECHNOLOGY INSIDE
Drive Unit
The toothed belt drive unit and the crank mechanism control the action of the diaphragm at all times. The long life drive unit is maintenance free.
Dosing Head
 The dosing head is designed with focus on user friendliness. A venting valve is standard on all pumps, and large union nuts facilitate assembly and access. The double suction valve ensures a tight seal during the extended discharge stroke.
Diaphragm
The design of the PTFE coated diaphragm ensures long life.
Microprocessor Control
The microprocessor based control system translates operator settings into the correct pump output.
Stepper Motor
The stepper motor ensures full control of the diaphragm movement during both the suction and discharge phases.
Composite Housing
The IP65 rated housing is robust lightweight and highly resistant to chemicals.
IMPROVEMENTS DELIVERED BY DIGITAL DOSINGT
- Pressure peaks in the dosing head and discharge line are minimised.
- Vibration caused by the sharp pulsation in traditional pumps is virtually eliminated.
- The additive is discharged more evenly.
The DME series goes one step further with its variable speed stepper motor. The speed of the DME motor is variable so the discharge phase extends over the full period between suction phases. The result is a better more even mix. It also means that the suction phase can be extended using the unique anti cavitation function. The slower suction phase made possible in a Digital DosingT pump ensures correct intake of additive every time – even when dosing high viscosity liquids.
FIELDBUS THE FINAL TOUCH
A Grundfos pump can stand alone, or it can be connected to advanced process automation systems. With fieldbus communications (e.g. PROFIBUS), you’re always well informed about plant status and in full control of your dosing system.
TECHNICAL SPECIFICATIONS
| Pump Type DME |
2 |
8 |
12 |
19 |
48 |
60 |
150 |
375 |
940 |
| Capacity at Max Pressure (l/hr) |
2.5 |
7.5 |
12 |
18.5 |
48 |
60 |
150 |
375 |
940 |
| Max Pressure (bar) |
18 |
10 |
6 |
6.3 |
2.6 |
10 |
4 |
10 |
4 |
| Setting Range |
1:1000 |
1:800 |
| Max Stroke Frequency (min-1) |
180 |
151 |
160 |
| Max Viscosity (mPa) |
500* |
100 |
3000** |
| Suction Lift (m) |
6 |
| Repeatability (%) |
±1 |
| Power Supply (V) @ 50/60 Hz |
100 to 240 |
| Max Current at 100V |
0.27A |
0.35A |
1.25A |
2.40A |
| Max Current at 230V |
0.16A |
0.26A |
0.67A |
1.00A |
* 200 mPa without spring-loaded valves
** 100 mPa without spring-loaded valves
Application Areas
- Neutralisation chemicals
- Disinfection chemicals
- Coagulants
- Flocculants
- Corrosion inhibitors
- Biocides
- Detergents
- Acid cleaners
- Alkali cleaners
- Zinc Phosphating chemicals
- Chromating chemicals
- Lubricants
- pH adjustment chemicals
- Oxygen scavengers
|
|
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 |
|
