Do pump vaporization and cavitation refer to the same phenomenon? What’s the difference?

Reply 1# www2008cs: It’s not the same phenomenon. Cavitation refers to the required net positive suction head of a pump, as well as the necessary installation height of the inlet pipe; otherwise, boiling will occur due to high-speed flow, which in turn exerts stress on the impeller. Vaporization is the boiling of a fluid under high-speed flow conditions

Pumping can easily cause cavitation in the pump! One is the cause, one is the result!

It is not the same phenomenon. Cavitation refers to the required NPSH of a pump, that is, the necessary installation height of the inlet pipe; otherwise, boiling will occur due to high-speed flow, causing impact on the impeller. Vaporization is the boiling of a fluid under high-speed flow

It’s not the same phenomenon. Cavitation in a pump is caused by the vaporization of the liquid inside the pump; vaporization refers to the process by which the fluid within the pump changes from a liquid state to a gaseous state. The vaporization of a material is related to temperature and pressure; at a certain pressure, the material begins to vaporize only when the temperature rises to a specific value ； If the pressure is reduced to a certain value at a specific temperature, the material will also vaporize; this pressure is referred to as the vaporization pressure of the material at that temperature. If, during the flow process, the pressure in a certain local area is equal to or lower than the vaporization pressure corresponding to the temperature of the material, then vaporization occurs at that location. After vaporization occurs, many small bubbles of steam mixed with gas are formed. As the bubbles move with the material flow from low-pressure areas to high-pressure areas, they burst under the effect of high pressure. The high-pressure material then flows at extremely high speeds into the space formerly occupied by those bubbles, creating a shock wave. Under the pressure of the material, the metal surface develops fatigue and suffers severe damage. Therefore, we refer to the entire process of bubble formation, growth, and collapse that leads to material damage as cavitation.

So, it can be said that vaporization necessarily leads to cavitation, right? Then what are the differences in their initial symptoms, and how can one tell whether it is vaporization or cavitation? ? ?

I guess what you want to ask is how to phrase it – the difference between gas binding and gas erosion, right? Hehe