Types of Circulation Pumps (Definition)

Types of circulation pumps in heating systems — these are different types of pumps used to ensure the circulation of the coolant in the heating system. They differ in design, operating principle, power and purpose.

Main types of circulation pumps:

1. Wet rotor (wet rotor pumps):
   • Design: The rotor and bearings of the pump are located in a liquid (heat carrier), which ensures their cooling and lubrication.
   • Advantages: Quiet operation, low power consumption, easy installation and maintenance.
   • Flaws: Limited in power and pressure, less efficient for larger systems.
2. Dry rotor (dry rotor pumps):
   • Design: The rotor is separated from the pumped liquid by a sealed casing, which prevents contact with the coolant.
   • Advantages: High power and pressure, suitable for large heating systems.
   • Flaws: Noisier, require regular maintenance and lubrication.
3. Single stage pumps:
   • Design: They have one working chamber and one impeller.
   • Advantages: Simple design, low cost, suitable for small heating systems.
   • Flaws: Limited in performance and pressure.
4. Multistage pumps:
   • Design: Contain several working chambers and impellers installed in series.
   • Advantages: High performance and pressure, suitable for complex and large heating systems.
   • Flaws: More complex design, higher cost and maintenance requirements.

Operating principles of circulation pumps:

• With fixed speed: Provides a constant operating speed, which may not be efficient enough for systems with variable heat demand.
• Variable speed (inverter): Equipped with electronics that regulate the pump speed depending on the current needs of the system, which increases energy efficiency and reduces operating costs.

Application and selection:

The choice of the type of circulation pump depends on the characteristics of the heating system, such as size, configuration and heat requirements. It is important to consider:

• Power and pressure: To ensure efficient circulation of the coolant throughout the system.
• Energy efficiency: Variable speed pumps can significantly reduce energy consumption.
• Noise level: Especially important for residential premises.

Circulation pumps play a key role in maintaining the efficient operation of the heating system, ensuring uniform heat distribution throughout all rooms. The correct choice of pump type allows you to optimize the system, reduce energy costs and ensure comfortable conditions in the room. Types of Circulation Pumps help to adjust the functionality of the hydraulic system, this is especially well implemented in the composition pumping group. Choosing between types of pump group and a circulation pump, significant savings can be achieved.