Industrial enterprises commonly use hot water pumps that demand high thermal transfer for piping. When the temperature falls below 100℃, most businesses opt for a simple and cost-effective thermal circulation system. However, during operation, hot water circulation pumps often experience anomalies such as vibration, noise, and irregularities in pressure and flow, which are often the primary causes of cavitation.

Firstly, cavitation is a phenomenon related to fluid mechanics, which is restricted by the fluid dynamic properties and the physical properties of the material, and is a characteristic phenomenon of fluid machinery.

Next, factors like temperature and pressure have significant impacts; the higher the temperature, the greater the vapor pressure, leading to more bubbles. Bubbles will also form when pressure is reduced to the vapor pressure at that temperature. These bubbles reduce the pressure at the pump's intake end. When the pump's suction pressure drops below the saturation vapor pressure of water, bubbles will form in the liquid. Under pressure differentials, bubble clusters will rupture, causing fatigue and cracks on the metal surface.

Third, some active gases within the bubbles, such as oxygen, enter the cracks on the metal surface with the help of the heat released during bubble condensation, leading to chemical corrosion of the metal.

The manufacturing level of pumps. The roughness and dryness of the inner surface of the pump body and the surface of the impeller are also significant causes of bubble formation. The thicker the surface, the more bubbles, and the corresponding decrease in pump efficiency.

Addressing the issue of hot water pump cavitation

In light of the aforementioned circumstances, on-site maintenance of cavitation is crucial. Addressing cavitation is a significant issue. Therefore, when cavitation occurs, the pump generates noise and vibration, leading to a sharp decline in its performance, such as head, flow rate, and pump efficiency. Concurrently, material damage intensifies, and the lifespan of mechanical components is shortened. It is imperative to avoid and eliminate cavitation phenomena.