Pump selection in dosing systems

1. Pump Types and Features

A. Peristaltic Pump

• Operating principle: The hose compresses and expands, moving the liquid forward.
• Advantages:
  • Minimal parts in direct contact with chemicals.
  • High flow rate accuracy, precise dosing even at low flows.
  • Suitable for corrosive and abrasive chemicals.
• Disadvantages: Limited hose life, restricted use at high pressures.

B. Diaphragm Pump

• Operating principle: Liquid is drawn and discharged by the back-and-forth movement of the diaphragm.
• Advantages:
  • Safe operation at high pressures.
  • Can be produced with chemical-resistant materials.
  • Facilitates automation and precise dosing.
• Disadvantages: More complex mechanism, requires maintenance.

C. Other Pump Types

• Piston pump: Used in applications requiring very high pressure.
• Other volumetric pumps: Suitable for very low flow rates.

2. Pump Selection Criteria

1. Flow Rate
   • The amount of chemical required by the system determines the pump's capacity per minute or hour.
2. Pressure
   • The pump must be able to provide the necessary pressure for the chemical to reach the pipeline and application point.
3. Chemical Compatibility
   • The pump material must be compatible with the acidity, alkalinity, and corrosive properties of the chemical to be dosed.
4. Accuracy and Control
   • A pump capable of accurate dosing even at small flow rates should be selected.
   • Must be compatible with automation and sensors (pH, chlorine, conductivity sensors).
5. Maintenance and Durability
   • A pump that is easy to maintain and for which spare parts are readily available should be preferred.
6. Cost and Energy Consumption
   • Both initial investment and operating costs should be considered.
   • An efficient pump saves chemical and energy in the long run.
   You can contact us for technical support regarding solutions suitable for your business.

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