Why is it important that the propeller is completely immersed in the substrate during operation?

The main purpose is to protect the propeller from damage. If the substrate is relatively liquid and the propeller plates protrude from the substrate during stirring or are only slightly covered, cavitation can occur. Cavitation phenomena describes the formation and dissolution of vapour bubbles that can damage the surface of the propeller.

Another importantg issue is imbalance which is oftgen caused when the blades are not imerged completely. 

Depending on the materials used, corrosion can also have an impact.

The top edge of the propeller should therefore be covered by the substrate by at least 10 to 30 cm. An immersion probe can help to ensure that the propeller is covered when the filling level changes.

---

you might also be interessted in