Wet rotor circulation pump

Wet rotor circulation pump — is a type of pump used in heating systems and water supply, in which the rotor and bearings are in contact with the circulating coolant or liquid.

Wet rotor circulation pump: main aspects:

1. Design:
   • Wet rotor: In this pump, the rotor and bearings are immersed in the liquid, which provides lubrication and cooling. This is different from dry rotor pumps, where the rotor and bearings are outside the liquid flow and require separate lubrication.
   • Hermetic seal: Provides leak protection and prevents liquid from coming into contact with the electric motor.
2. Principle of operation:
   • Circulation: The pump creates a flow of liquid (for example, a coolant in a heating system) by rotating the rotor, which increases the pressure and promotes the movement of liquid through the system.
   • Continuous cooling: Since the rotor and bearings are lubricated and cooled by liquid, this reduces thermal loads and wear of parts.
3. Advantages:
   • Silence of operation: The wet rotor reduces noise levels compared to dry rotor pumps because the liquid acts as an additional noise damper.
   • Energy efficiency: Typically, such pumps have high energy efficiency and low energy consumption.
   • Corrosion resistance: Since the rotor and bearings are in the liquid, they are protected from corrosion if the liquid has antifreeze or anticorrosive properties.
4. Application:
   • Heating and water supply: Often used in heating systems for hot water circulation, in water supply systems and air conditioning.
   • Modular systems: Can be part of modular heating systems where constant and reliable fluid movement is important.
5. Installation and maintenance:
   • Easy to install: Generally, installation of such pumps is quite simple, as they usually have standard fastenings and connections. The wet rotor circulation pump is the most commonly used version of the pumps.
   • Service: The wet rotor requires less maintenance than dry rotor pumps, as the lack of need for separate lubrication simplifies operation.
6. Flaws:
   • Temperature limitation: Not all models can handle very high temperatures, requiring a pump with appropriate characteristics to be selected.
   • Less durability in difficult conditions: In systems with highly aggressive liquids or in difficult operating conditions, dry rotor pumps may be required.

The wet rotor circulation pump is an effective solution for maintaining liquid circulation in various systems, providing reliable and quiet operation with minimal maintenance requirements.