DME and DMS Dosing Pumps

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Pure Aqua distributes Grundfos 60 Cycle High Pressure Pumps and 50 Cycle High Pressure 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:

  • 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  
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Pure Aqua manufactures and supplies RO systems, and as a leading RO supplier in the sphere of development and implementation of
reverse osmosis and water treatment systems, Pure Aqua earned a great industry reputation in the RO market.
In all commercial and industrial RO systems that Pure Aqua supplies, we include a cleaning procedures in the operating and installation manual.
Pure Aqua, as a leader RO supplier, has a presence all over the world with a strong dealership network to help our customers.

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