Whilst water-ring vacuum pumps are widely recognised for their various advantages, they must be operated strictly in accordance with regulations to achieve optimal results. Let us now examine the reasons why water needs to be continuously added during the operation of a water-ring vacuum pump.

Although the use of vacuum pumps is often associated with water, they still require water to function. During operation, a vacuum pump requires a liquid as its working fluid, and water is almost always chosen for this purpose. When the impeller rotates clockwise, water is flung outwards by the impeller. Due to centrifugal force, the water forms a closed ring of approximately uniform thickness, the shape of which is determined by the pump chamber. The lower inner surface of the water ring is tangent to the impeller hub, whilst the upper inner surface is in contact with the tips of the blades. at which point a crescent-shaped space is formed between the impeller hub and the water ring; this space is in turn divided by the impeller into a number of small chambers equal to the number of blades. If the lower part of the impeller at 0° is taken as the starting point, then during the first 180° of rotation , the volume of the small chambers increases and they communicate with the suction port on the end face; at this point, gas is drawn in. When suction is complete, the small chambers are isolated from the suction port; as the impeller continues to rotate, the small chambers decrease in volume, causing the gas to be compressed; when the small chambers communicate with the discharge port, the gas is expelled from the pump.

If the water level drops, the pump’s efficiency will decrease, leading to increased energy consumption and higher operating costs. The working fluid serves not only to extract gas but also to reduce the temperature of the pump body. If the working fluid level falls significantly below the normal level, the heat generated by the pump body will increase, reducing the pump’s service life and raising maintenance costs. Therefore, it is essential to maintain the working fluid at the correct level whilst the water-ring vacuum pump is in operation; this ensures the pump functions correctly and facilitates maintenance whilst reducing expenditure. The working fluid can be regarded as the pump’s driving force; without this force, how can the vacuum pump function effectively? Consequently, we must not be stingy and should top up the water from time to time to ensure normal operation.

The above explains the reasons for the need to continuously top up the water level during the operation of water-ring vacuum pumps. Owing to their distinctive advantages, these pumps are now widely used. We would like to remind everyone once again that during construction, operations must be carried out in strict accordance with the operating regulations to avoid unnecessary complications and losses. We hope the information provided here proves helpful.