The plunger pump works on the principle of creating pressure in the chamber due to the translational movement of the plunger (piston). Main stages of operation:

1. Reverse plunger stroke:
   As the plunger reciprocates, a vacuum is created in the working chamber, which draws the liquid through the inlet valve.
2. Straight plunger stroke:
   As the plunger moves forward, the fluid is compressed, creating pressure, and is discharged into the outlet pipe through the outlet valve.
3. Valve system:
   One-way valves allow fluid to flow in one direction only, preventing reverse flow.

Areas of application

1. Chemical industry:
   • Transportation of aggressive substances such as acids, alkalis, solvents.
   • Precise dosing of reagents in chemical processes.
2. Pharmaceutical industry:
   • Highly accurate dosage of active ingredients in the production of medicines.
   • Sterile transport of liquids in laboratory or production environments.
3. Energy:
   • Supply of fuel, lubricants and coolants.
   • Use in high-temperature or high-pressure systems.
4. Oil and gas industry:
   • Pumping heavy oil products and liquids with high viscosity.
   • Introduction of chemical additives in the refining process.
5. Food industry:
   • Precise dosage of syrups, flavours and preservatives.
   • Working with viscous products such as honey or pastes.

Features of plunger pumps

1. High pressure:
   Plunger pumps can deliver pressures of up to 1000 bar, enabling the transport of liquids even in difficult conditions.
2. Dosing accuracy:
   They provide precise control of fluid flow, even in small volumes, making them ideal for applications requiring high repeatability.
3. Resistance to aggressive environments:
   The use of materials that are resistant to chemical attack (stainless steel, titanium, ceramics) allows us to work with aggressive liquids.
4. Simplicity of design:
   The robust and compact design with a minimum of moving parts ensures durability and reduces maintenance costs.
5. Wide viscosity range:
   They can transport both watery and highly viscous liquids.
6. Performance control:
   You can adjust the fluid flow rate manually or automatically.

How do I choose the right plunger pump?

1. Fluid characteristics:
   • Take into account the viscosity, chemical composition and temperature of the liquid.
   • Check whether the liquid is aggressive or abrasive.
2. Performance and pressure:
   • Determine the required volume of fluid to be delivered per unit time.
   • Make sure that the pump meets the maximum pressure requirements.
3. Materials of execution:
   • For aggressive liquids, choose models with a body and plunger made of chemically resistant materials (e.g. PTFE, ceramic).
4. Operating conditions:
   • Consider the temperature, humidity and the need to work in explosive atmospheres.
5. Protection systems:
   • Make sure that the pump is equipped with a dry-running or overpressure protection system.
6. Sanitary requirements:
   • For the food or pharmaceutical industry, check the compliance of the pumps with FDA or EHEDG standards.