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How a dosing pump works

The use of dosing pumps to dispense liquids and chemicals

07-01-2025

How a dosing pump works

Dosing pumps are essential tools in many sectors, from water treatment to industrial cleaning, due to their ability to dispense precise quantities of liquids and chemicals in a controlled manner. Used to ensure the application of exact doses of substances, these devices are in high demand for their contribution to ensuring the quality of processes and the safety of results.

In this article, we will discover how these technologies are designed and used, how they work, and why they are so beneficial for different types of applications.

What are dosing pumps?

Dosing pumps are devices designed to transfer precise quantities of a liquid from one tank to another. Their precision makes them ideal for the accurate distribution of chemical solutions, detergents and other substances in industrial processes.

There are different types of dosing pumps, each suitable for specific applications and liquids:

  • Diaphragm dosing pumps: use a flexible diaphragm to propel the liquid, ensuring high precision and optimal resistance to corrosive chemicals. Ideal for applications where contamination must be avoided.
  • Piston dosing pumps: equipped with a piston that moves inside a cylinder to create pressure, they are perfect for high-pressure dosing, offering high precision and robustness, but require more frequent maintenance.
  • Peristaltic dosing pumps: these are based on the movement of a hose that is compressed to advance the liquid. They are ideal for handling viscous fluids and do not require valves, making them easy to maintain and clean.
  • Electromagnetic pumps: they use an electromagnetic system to create the suction and thrust movement of the liquid, making them very reliable in light industrial applications with low energy consumption.

The choice of dosing pump type depends on the type of liquid to be treated, the precision requirements and the pressure required in the process.

How a dosing pump works

The operation of a dosing pump is based on a process that includes several steps, each essential to ensure dosing accuracy and reliability, using different mechanisms depending on the type of dosing pump:

  • Suction phase: In the initial phase, the pump generates a pressure that allows the liquid to be sucked from the tank and enter the pump body via the inlet valve. In this phase, it is essential that the valves are in perfect condition to avoid liquid backflow or contamination.
  • Compression phase: once the liquid has been sucked in, the pump switches to the compression phase, during which pressure is exerted to push the liquid towards the outlet. The pressure generated during this phase is precisely controlled, and it is during this phase that the amount of liquid to be dosed is adjusted to ensure dosing uniformity.
  • Dosing and release: in the final stage, the liquid is dosed and released through the outlet valve with the exact quantity set. Dosing can be adjusted via various parameters such as the frequency of piston or diaphragm movement and the size of the dosing chamber. Some advanced models allow electronic dosing control, offering the possibility of real-time adjustment of the liquid volume.

The system allows accurate control of the amount of transferred liquid, minimising errors and waste, making the dosing pumps ideal for the precise dosing of chemicals and detergents in the industrial sector.

The advantages of dosing pumps

The use of dosing pumps offers many advantages that make them indispensable in industrial and commercial settings where precise liquid handling is required:

  • High precision: dosing pumps allow exact quantities of liquids to be dosed, reducing the risk of measurement errors and ensuring strict dosage control.
  • Versatility: these types of pumps can be used for a wide range of fluids, from detergents to corrosive chemicals, and are easily adapted to different application contexts.
  • Waste reduction: thanks to precise dosing, they minimise material consumption, contributing to more sustainable resource management.
  • Increased safety: through these technologies the risk of direct handling of hazardous substances is reduced, increasing the safety of operators and the environment.
  • Operational efficiency: they reduce manual intervention time and enable continuous operation, improving productivity in industrial processes.

The application areas of dosing pumps

Dosing pumps are applied to various industries due to their ability to adapt to a variety of dosing requirements:

  • Water treatment: they are used to dose disinfectants, pH regulators and flocculating agents, ensuring that water is treated effectively and safely.
  • Food industry: they are used to dose ingredients such as flavourings, colourings and preservatives, ensuring that each product consists of the right proportion of components.
  • Chemical production: used to handle potentially dangerous chemicals, they ensure precision and process safety.
  • Industrial cleaning: ideal for dispensing detergents and sanitisers in large environments, they improve the effectiveness of automated cleaning systems.
  • Agriculture: for precise dosing of fertilisers and pesticides, dosing pumps support sustainable cultivation and waste reduction.

Conclusion: Emiltec's role in dosing pump consulting and sales

Dosing pumps are therefore an indispensable solution for the precise dosing of liquids and chemicals in an industrial environment.

Emiltec specialises in the sale of electromagnetic dosing pumps and volumetric dispensers for the suction, dilution and dispensing of liquid or foaming cleaning solutions.

If you need support in choosing the ideal product for your needs, contact us for a personalised consultation and to discover the range of solutions suitable for your sector.