Although the functions of activated alumina filter 30-150-219 and diatomaceous earth filter are similar in terms of anti fuel and acid removal, there are differences in their performance as follows:

1. Acid removal ability
-Activated alumina filter 30-150-219: It has stronger acid removal ability, with a capacity of 1.17 grams of molecular acid per liter, which is about 200% higher than diatomaceous earth filter. This means that the activated alumina filter can more effectively remove acidic substances from the fire-resistant oil, maintaining the purity and acid-base balance of the oil quality.
-Diatomaceous earth filter: The acid removal efficiency is relatively low, with a capacity of only 0.59 grams of molecular acid per liter. Diatomaceous earth filter has limited effectiveness in treating high acid value fire-resistant oil, and is usually only used in situations with low acid value. When the acid value exceeds 0.2, its processing capacity will significantly decrease.

2. Adsorption performance
-Activated alumina filter 30-150-219: With a porous and highly dispersed structure, it provides excellent chemical and physical adsorption capabilities. It can effectively adsorb acidic substances and impurities in fire-resistant oil, thereby improving the quality of the oil.
-Diatomaceous earth filter: Its adsorption performance is relatively weak, and its ability to adsorb acidic substances and impurities in oil is limited. Diatomaceous earth filter mainly relies on its microporous structure for filtration, but its effectiveness in adsorbing acidic substances is not as significant as activated alumina filter.

3. Chemical stability
-Activated alumina filter 30-150-219: has good thermal stability and chemical inertness. It can maintain stability in a wide temperature range, will not react with the fire-resistant oil, and will not release metal ions, acidic substances and gel shaped polyphosphates. This makes the activated alumina filter cartridge safer and more reliable during use.
-Diatomite filter element: contains a large number of free metal ions, which will react with the fire-resistant oil to generate gel like phosphate metal salt. This gel like substance may cause the servo valve to jam and affect the normal operation of the system. In addition, the chemical composition of diatomaceous earth filter cartridges may vary between different batches, and there is a certain degree of unpredictability when used.

4. Service life
-Activated alumina filter 30-150-219: Due to its efficient acid removal ability and good chemical stability, the service life of activated alumina filter is relatively long. It can handle more oil volume and has a lower replacement frequency, thereby reducing maintenance costs.
-Diatomaceous earth filter: Due to its low acid removal efficiency, the service life of diatomaceous earth filter is relatively short. It needs to be replaced more frequently, especially when dealing with high acid resistant fuel, and its processing capacity will quickly reach its limit. Usually, when the acid value exceeds 0.30mg/g, the processing capacity of the diatomaceous earth filter will significantly decrease.

5. Impact on the system
-Activated alumina filter element 30-150-219: it will not release metal ions and react with phosphate ester to generate gel like phosphate metal salt, so it will not cause adhesion of servo valve. In addition, the activated alumina filter can also increase the electrical resistivity of phosphate ester fire-resistant oil, avoiding electrochemical corrosion of components and extending the service life of the system.
-Diatomaceous earth filter: It releases metal ions such as calcium, magnesium, and iron, which can reduce the electrical resistivity of the fire-resistant oil and increase the risk of electrochemical corrosion in the system. In addition, the gel like phosphate metal salt generated by the diatomite filter element may also cause the servo valve to jam, affecting the normal operation of the system. At the same time, the diatomite filter element may also deteriorate the foam performance of the fire-resistant oil, further affecting the stability and reliability of the system.