This product can be used to demonstrate the cavitation effect of the centrifugal pump impeller. The pump casing and the pipes on the inlet side of the pump are made of transparent plastic to observe the cavitation process. The water tank is equipped with a heater, and the water temperature can be controlled. At the same time, the water temperature, flow rate and pump speed in the water tank are displayed. The water is cooled by the water supply system. Take a photo with a short exposure time (flash), this method can capture an excellent image of bubbles. The valves at the inlet and outlet of the pump can adjust the flow and pressure accordingly. The pressure on the inlet and outlet sides are displayed on two pressure gauges. 

Water pump cavitation refers to the process in which bubbles in the low-pressure area of ??the water pump flow system are compressed and quickly collapsed as the water reaches the high-pressure area, which causes the deterioration of hydraulic performance and the damage of the flow components.

The gas nucleus existing in the gap between the contact surface) rapidly grows into a cavitation bubble, and reaches the high pressure area with the water flow, and is quickly collapsed by the compression of the surrounding liquid. In the cavitation collapse zone, the metal surface is subjected to a water hammer force, the frequency of which can reach tens of thousands of times per second, and it acts on a very small area, so its stress can reach thousands of atmospheric pressure. When the effective cavitation margin of the water pump device is less than the necessary cavitation margin of the water pump, and the partial pressure in the pump drops to the saturated vaporization pressure at the liquid temperature, the impurities, tiny solid particles or liquid interface (liquid and solid) in the liquid. Frequent application of such a large stress causes plastic deformation and hardening of the metal surface layer, resulting in local fatigue and micro cracks, which promote the development of cavitation. The situation is more serious with pumps that take water from streams with high sand content. The metal components are broken and peeled off. Cavitation may occur on the back and front of the impeller blades, or between the outer edge of the impeller and the wall of the impeller chamber. Generally, water pump cavitation reduces the flow, head, power and efficiency of the pump, causing unit vibration and noise, shortening the life of equipment, and affecting engineering safety.

Performance Parameters:

Water tank: 20L

Voltage: AC220V 50HZ

Water pump: power 370W, flow rate 3m³/h, head: 14 meters

Temperature: 0…60°C

Pressure (inlet): -1…0bar

Pressure (outlet): 0…1,5bar.

Dimensions: LXWXH 1000x630x590mm

Weight: <70kg.