Vacuum pumps are now in widespread use; however, there are many substandard products currently on the market, which pose a safety hazard in our daily lives. As society develops, their use is becoming increasingly commonplace due to mandatory requirements. Let us now take a look at the reasons why water needs to be continuously added when using vacuum pumps.

In water-ring vacuum pumps, water serves as the primary working fluid, and normal operation is dependent on water circulation. If the equipment is to operate efficiently, water must be added continuously during use to facilitate water circulation, thereby ensuring the equipment functions correctly. Water-ring vacuum pumps require a liquid as the working fluid during operation, with water being the standard choice. 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, which determines the shape of the pump chamber. The lower inner surface of the water ring is tangent to the impeller, whilst the upper inner surface of the water ring is in contact with the tops of the vanes.

The impeller of a water-ring vacuum pump forms a crescent-shaped space with the water ring; this space is further divided by the impeller into several small chambers, equal in number to the number of blades. Taking the lower part of the impeller at 0° as the starting point, as the impeller rotates through the first 180°, the volume of the small chamber increases and communicates with the inlet port on the end face; at this point, gas is drawn in. When the suction phase ends, the small chamber is isolated from the inlet port; As the impeller continues to rotate, the volume of the small chambers decreases, causing the gas to be compressed; when the small chambers communicate with the exhaust port, the gas is expelled from the water-ring vacuum pump.

When the water level drops, the efficiency of the water-ring vacuum pump decreases, energy consumption increases, and operating costs rise. 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, this will increase the heat load on the pump body, reduce its durability and increase maintenance costs. During operation, as a water ring vacuum pump requires a sufficient supply of water for circulation, water should be topped up continuously to reduce energy consumption and improve efficiency. This promotes the discharge of gas from the equipment whilst also helping to stabilise the gas pressure.

The above explains the reasons for continuously topping up the water during the operation of a vacuum pump. Please use this as a reference; it is essential to follow the prescribed operating procedures during future use to avoid unnecessary complications and achieve the desired results. We hope this information proves helpful.