What are the effects of water shortage on a self priming pump that does not discharge liquid?

In some places, self priming pumps may dry up due to a lack of cooling and centripetal force. What are the effects of dry running of self priming pumps: unauthorized heating, wear, and corrosive materials; Vibration or other phenomena. Even the complete destruction of the self priming pump.
If partial or complete dry running cannot be completely ruled out from an operational perspective, it may be necessary to increase costs in order to design a self priming pump separately. (Self priming pumps that can operate without water filling can be selected) including: strengthening the pump shaft to better prevent radial contact between the rotor and the pump casing; Corresponding gap handling measures (gap sealing); Mechanical seals independent of the medium, packing boxes with lubricating and sealing fluids, and bearings.
Some pumps are equipped with hydraulic pressure reducing devices to prevent axial thrust bearings from biting. The pump can be equipped with a dry rotation protection device, so that when dry rotation occurs, the pump can stop and be protected.