High water quality and operating temperatures beyond certain thresholds are the primary causes of scaling in vacuum pumps. Among the water quality indicators, the hardness of water has the greatest impact. To address the issue of scaling in vacuum pumps, it is essential to minimize water hardness and control the operating temperature of the recirculating water as much as possible.

1. Temperature Control of Recirculating Cooling Water

The analysis above indicates that the temperature difference between the water ring inside the vacuum pump and the water temperature in the softened water pool is a significant factor causing scaling. Therefore, increasing the circulating water supply to enhance cooling efficiency is a crucial guarantee for reducing scaling speed.

During the operation of the circulating cooling water, it is necessary to monitor the return water temperature and flow rate of each pump to ensure normal water supply and that the return water temperature does not exceed the specified 40℃. Water supply can be controlled via valves. If the return water temperature exceeds the standard, measures such as adding low-temperature cold water or using other cooling methods should be taken to lower the temperature of the softened water in the softening pond.

2. Recirculating Cooling Water Hardness

The operation of recirculating water in a vacuum pump is similar to the water operation in a low-pressure hot water boiler. Therefore, managing the water quality of the vacuum pump according to the quality standards of hot water boilers can prevent scaling and corrosion in the vacuum pump.

Vacuum pump circulating water systems are mostly open-loop systems with high water recovery rates. In cases where ion exchange equipment is not used due to factors such as funding, it is common to supply water to the vacuum pump using a softening pool and a high-level pool.

3. Regular flushing of the pump casing

The drain valve of the water ring vacuum pump's pump body, in addition to normally discharging accumulated water inside the pump, can also utilize the water pressure generated by the pump body's operation to regularly flush out dirt and sludge during operation. This not only prevents the accumulation of dirt but also prevents the conversion of sludge into scale.

The issue of scaling in vacuum pumps has a relatively complex formation mechanism. Correctly analyzing water quality indicators and operating parameters is crucial for identifying the right preventive measures. In addition to water temperature control and regular flushing of the pump casing, water treatment is a vital component in preventing scaling within the pump body.