Founded in 1949, Grundfos Pumps Corporation, is one of the world’s largest manufacturers of pumps, providing pumps for homes, farms, commercial buildings and industrial uses. Pure Aqua offers a full range of pumps from Grundfos.

CR Series

J P Booster Pumps

CHI Commercial Pumps

MQ Booster Pumps

DME and DMS Dosing Pumps

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: DMS Dosing Pump

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.

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

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

Second model in Dosing

Grundfos DME dosing pumps are high quality 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.Now you no longer have to struggle for precision. Digital DosingT is here, and it has come to make your life easier. It’s that simple, and it’s from Grundfos. We are talking about true innovation. The principles are new, the methods are new, and the patents are pending! No more guesswork, no more hassle with setting the pump. The future of dosing technology has arrived.

Digital DosingT 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 DosingT 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.

Digital Dosing Pump

High Capacity Digital Dosing Pump

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**